Ari Shapiro

Monday morning in Iowa, I caught up with Mitt Romney's strategist Eric Fehrnstrom after the campaign's first event of the day, a speech at the Mississippi Valley Fairgrounds in Davenport.

In the last hours before Tuesday night's caucus, Fehrnstrom said, the former Massachusetts governor plans to consolidate his support by visiting areas in the eastern part of the state where he had a strong showing in 2008 — places like Dubuque and Cedar Rapids.

One of the most important things to understand about global affairs is how much lies beyond any one country's control, even for the most powerful country in the world.

Anthony Cordesman of the Center for Strategic and International Studies says the limits on American power were especially apparent this year.

"American power has always had many real-world limits," he says.

In some ways, he says, that makes President Obama's accomplishments all the more notable.

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SCOTT SIMON, HOST:

This is WEEKEND EDITION from NPR News. I'm Scott Simon. Mitt Romney had one of the busiest public stretches of his presidential campaign this week. A big blue bus with his name on the side rolled along hundreds of miles of New Hampshire roads making more than a dozen stops to meet voters just three weeks before the primary. The campaign called it The Earn It Tour. NPR's Ari Shapiro was along for the ride.

On the trail with Mitt Romney in New Hampshire Thursday morning, I encountered the first Occupy protesters of the three-day bus trip.

One of them, Bob Broadhurst, grew up in Boston but now lives in nearby Littleton, N.H. He's been one of the Occupy protesters in New York since September, but returned to New Hampshire to protest along Romney's route.

A fourth-generation electrician, Broadhurst is an IBEW union member and his main issue is what he calls "the attack" on unions and labor. Romney represents a convenient target for his ire.

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RENEE MONTAGNE, HOST:

Most of the Republican presidential candidates are focusing their campaign efforts on Iowa at the moment; the first-in-the-nation caucuses there are less than two weeks away.

But not former Massachusetts Governor Mitt Romney. He's hundreds of miles away from Iowa, in New Hampshire. And today he's setting off on a three-day tour of the state, eyeing an early primary win.

In the final leg of the campaign in Iowa, the Republican presidential candidates are talking about judges. No one has made them a bigger issue than Newt Gingrich.

Overhauling the judiciary has become one of his key proposals on the stump.

Conservatives have used "activist judges" as a battle cry for many election cycles now. But in Iowa, the issue has special resonance since the judiciary became a potent political issue two years ago.

The last American troops are coming home from Iraq this month, and President Obama is marking the occasion with a series of events to commemorate the conclusion of the war.

On Wednesday at Fort Bragg, N.C., he and the first lady will thank troops for their service.

This event is a decade in the making, with far-reaching implications including domestic political consequences.

At the end of this month, a payroll tax cut is set to expire that the White House says would result in a tax increase of about $1,000 per year on most middle-class families. The benefit is popular with the American people, which may be one reason President Obama has been relentlessly promoting it.

The president argues that extending the payroll tax "holiday" through 2012 is vital to the economy. Republicans in Congress are divided over that, but they strongly disagree with the president's plan to pay for it with a surtax on millionaires.