NPR: Brian Naylor

With 10 states holding Republican primaries or caucuses on March 6 — Super Tuesday — a lot of money is being spent on TV ads. The superPACs supporting the remaining GOP candidates have doled out some $12 million for ads in those states.

Leading the way is Restore Our Future, the superPAC that backs former Massachusetts Gov. Mitt Romney. According to Federal Election Commission numbers, Restore Our Future has spent $6.9 million on the Super Tuesday states.

The rise of Rick Santorum in the race for the Republican presidential nomination hasn't exactly gone unnoticed by rival Mitt Romney or his friends. Turn on a TV in Michigan this weekend, and chances are you won't have to wait long to see an ad attacking the former Pennsylvania senator.

"America is drowning in national debt," a narrator intones in one ad, a product of Romney's campaign. "Yet Rick Santorum supported billions in earmarks."

Former House Speaker Newt Gingrich made appearances before two communities in Florida Friday whose votes he hopes to win in next Tuesday's GOP primary. He spoke to Latino home builders and business people in the morning, and had a rally with a group of Republican Jewish voters in the afternoon. NPR's Brian Naylor reports.

As he campaigns for the Republican presidential nomination, Newt Gingrich almost always works the name of Ronald Reagan into his speeches.

In fact, it's become so common that Gingrich's name-dropping has become an issue itself.

Sometimes Gingrich invokes the name of Ronald Reagan to associate himself with the policies of the former president.

"When I worked with President Reagan, we adopted a lower tax, less regulation, more American energy policy, and it led to 16 million new jobs," Gingrich said at a speech in St. Petersburg, Fla., this week.

Newt Gingrich is a self described space nut. He traveled to Florida's Space Coast near Cape Canaveral Wednesday to outline what he described as a bold program that would send Americans back to the moon and beyond.

Gingrich outlined his vision to a crowded hotel ballroom in Cocoa, not far from the Kennedy Space Center. He talked of coming of age at the time of Sputnik, which was the first satellite launched in 1957 by the Soviet Union. He recalled reading science fiction, author Isaac Asimov and Missiles and Rockets magazine.

The Republican presidential candidates continue campaigning in Florida in advance of next Tuesdays GOP primary. Newt Gingrich, who is leading the polls, made a series of stops along the state's Gulf Coast. He attacked President Obama for high gas prices.

GOP presidential campaigns and superPACs have been spending millions of dollars on TV and radio advertising ahead of Saturday's South Carolina primary. While the negative superPAC ads air, the candidates are delivering a more positive message.

While GOP presidential candidate Mitt Romney savored his second consecutive win in the Republican nominating process, those who finished behind him in New Hampshire also continued on to South Carolina. They are hoping that it is in the Palmetto state where they can get his campaign to to stumble before it becomes unstoppable.

Newt Gingrich has seen his once-sizable lead in Iowa collapse over the past couple of weeks. One of Gingrich's rivals, Texas Rep. Ron Paul, has taken to the airwaves with very tough ads targeting the former House speaker. And a pro-Mitt Romney super PAC has also run ads criticizing Gingrich. All this raises a question: Does traditional, on-the-airwaves negative advertising still work?

Ron Paul is surging in the polls — at least in Iowa — reflecting the implosion of other candidates, his memorable debate performances and eclectic libertarian positions. He's for ending the wars — as well as what he calls the "socialist big government." What is his role in the GOP nomination race? Who is he hurting and helping? Could he conceivably win the nomination? Does he want to be president?

A debate in Richmond, Va., on Wednesday kicks off what promises to be one of the most closely watched and expensive U.S. Senate races in 2012.

The seat in question is being vacated by Democrat Jim Webb, who has chosen not to run for a second term. Running to replace him are two former Virginia governors: Republican George Allen, who held the Senate seat before Webb defeated him in 2006, and Democrat Tim Kaine, who recently served as chairman of the Democratic National Committee.

It's a race likely to revolve around two key issues: President Obama and the economy.

Unmanned aircraft — or drones — are playing a large role in U.S. military operations in Afghanistan but they're starting to show up in increasing numbers in U.S. as well. Drones are already used to patrol the border with Mexico and now they may soon be coming to a police department near you.

The Democratic National Committee released an Obama campaign ad Monday suggesting that Mitt Romney's worst enemy is Mitt Romney. The TV ad, airing in targeted markets in five swing states — including Ohio and Pennsylvania — highlights Romney's evolving positions on such central issues as health care, abortion and bank bailouts. It suggests Democrats assume Romney will be the nominee and indicates their plan of attack for the year.

Newt Gingrich served as speaker of the House of Representatives for four turbulent and productive years.

From 1995 through 1998, Congress forced a government shutdown, overhauled the welfare system, balanced the budget for the first time in decades and impeached a president for the second time in history.

Gingrich was in the middle of those debates, fiery in his rhetoric, yet willing to compromise and work with a Democratic president.

The 104th Congress

As the Republican presidential candidates prepare for another debate, this one Saturday night in South Carolina, former House Speaker Newt Gingrich has been campaigning in New Hampshire.

He opened up his state headquarters Friday, buoyed by some recent polls that show his support increasing among Republican voters. A new CBS poll has him tied for second place with Mitt Romney, behind Herman Cain.

The government is trying to modernize the nation's air traffic control system, but cost overruns, software problems and management concerns are making some wonder whether the so-called "Next Generation" system may take another generation to complete.

The radar screens in the nation's aircraft control towers are based on technology dating to World War II. Many of the routes airliners fly were laid out at a time pilots followed bonfires for navigation at night.

President Obama came into office with strong Latino support, having won two-thirds of the Latino vote, according to exit polls. But for some, that support has turned to disillusionment.

"There's a deep sense of betrayal and disappointment towards the Obama administration," said Sarahi Uribe, coordinator of the National Day Laborer Organizing Network.

Indeed, the latest Gallup poll shows his support among Latino voters has fallen to 48 percent, a new low.

Voters in West Virginia will choose the state's next governor on Tuesday, in a special election to finish the term of Democrat Joe Manchin. The popular former governor left office after being elected to the U.S. Senate last November.

On the ballot are the man who has been acting governor, Democratic state Senate President Earl Ray Tomblin, and GOP businessman Bill Maloney.

But Republicans are trying to make the race a referendum on someone not on the ballot: President Obama.

'We Got To Fight Back Washington'

Congress is at odds over a measure needed to keep the government operating past the end of the month.

While lawmakers have a week to work out their differences before the government faces another partial shutdown, one agency faces a much earlier deadline.

The Federal Emergency Management Agency will run out of money early next week, putting a halt to projects in communities around the country still struggling to recover from this year's spate of hurricanes, tornadoes and wildfires.

The corner of 15th and K streets in Washington, D.C., is busy. Buses, trucks, cars and taxis zip by. There are pedestrians and, increasingly, bikes.

Some 57 million adults ride bicycles in the U.S., whether for commuting or exercise or fun. Cities are adding bike lanes with the help of a federal program that gets its money from the highway bill. Some Senate Republicans tried — and ultimately failed — to block funding for that program, which also pays for sidewalks and other pedestrian improvements.

The Department of Homeland Security and state governments spend billions of dollars every year on domestic security, helping cities and counties buy up-to-date equipment and strategies for defeating terrorists.

Established in November 2002, the new department absorbed 22 different federal agencies, with the idea of unifying homeland security efforts. But after all this time, have those efforts made us safer?

At the Smithsonian's National Museum of American History, a small temporary exhibit marks Sept. 11, 2001. Along with artifacts found in the wreckage of the World Trade Center and the Pentagon — like a smashed firetruck door and twisted bits of fuselage — is a bin filled with every imaginable object people have tried to carry on airplanes.