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.

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.