Story highlights Rand Paul makes first 2015 trip to Iowa, home of first presidential caucuses He's trying to build a broad coalition of voters, but says he hasn't strayed far from his roots

"You're going to get a choice on who the nominee is for the Republican Party. You're going to have 9, 10, 15, 20 who are eager to go and want troops on the ground," he said, talking about the war against Islamic extremism. "They want 100,000 troops on the ground. Right now. In all the countries."

The Kentucky Republican had a rough week but found a friendly audience Friday night headlining an "Audit the Fed" rally at Jasper Winery in Des Moines, an event packed with many of his father's supporters and hosted by a group called Liberty Iowa.

It was a curious strategy for a man who's trying to build a broad coalition of voters behind him, but he assured supporters that he hasn't strayed far from his roots.

"Some of you may remember I sued the President," he said, pointing to a lawsuit he launched last year against the National Security Agency over its bulk metadata collection effort.

He didn't, however, mention that the lawsuit has been put on hold, or that he voted against a reform package in Congress last year because he felt it didn't go far enough in tweaking the agency.

Paul, who faced criticism this week over comments expressing doubt about the effectiveness of vaccinations and took heat over drama involving one of his advisers, is in Iowa on a quick two-day swing that puts him in front of familiar audiences.

Following the "Audit the Fed" rally Friday night, he attends the Iowa State University men's basketball game Saturday, as well as a watch party with young voters and a meet-and-greet with freshman Rep. Rod Blum.

Paul is one of many Republicans who will barnstorm the state in the coming months, seeking support ahead of Iowa's first-in-the-nation presidential nominating contest a year from now. While it's his first time in the state this year, Paul visited Iowa five times last cycle, and has indicated he plans to make the state a big part of his 2016 strategy.

His father, ex-Texas Rep. Ron Paul, built a solid foundation of supporters in Iowa during his 2008 and 2012 campaigns, a base that Paul is trying to court while also making inroads with the mainstream and socially conservative Republicans in the state.

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Rand Paul invokes libertarian roots with Iowa kick-off event