Rep. Paul Ryan is heading back to Iowa.

In a move sure to stoke further buzz that the 2012 Republican candidate for vice president has not ruled out a bid for the presidency in 2016, Ryan will headline the Iowa Republican Party's annual Lincoln Dinner on April 11.

"As our party's nominee in 2012, Paul Ryan brought a tremendous amount of new energy to our ticket," said Iowa Republican Party Chairman A.J. Spiker. "As a congressman he's created a conversation about the budget that most in Washington are unwilling to have, and he's a proven leader armed with solutions to expand opportunity for all Americans."

The dinner is a favorite event for Republicans hoping to make political inroads in a state key to winning the party's nomination for president. Sen. Rand Paul, R-Ky., who has made no secret of mulling a run for the White House, headlined the event last year.

Ryan's interest in running for president is less certain. He is no doubt popular in Iowa: He was the featured guest at Iowa Gov. Terry Branstad's birthday bash in November, and a December Des Moines Register poll showed Ryan leading the potential Republican field for president.

But Ryan, currently the House Budget Committee chairman, could prefer instead to take the reins of the influential Ways and Means Committee when Rep. Dave Camp's term in that role expires.