AP sources: Ryan expected to endorse Romney

KASIE HUNT and LAURIE KELLMAN
FILE -- In this April 5, 2011 file photo, House Budget Committee Chairman Rep. Paul Ryan, R-Wis. speaks at a news conference at the Capitol in Washington. Republicans are ready to ram through the House an election-year, $3.5 trillion budget that showcases their deficit-cutting plan for revamping Medicare and slicing everything from food stamps to transportation while rejecting President Barack Obama's call to raise taxes on the rich.  (AP Photo/J. Scott Applewhite/File)
FILE -- In this April 5, 2011 file photo, House Budget Committee Chairman Rep. Paul Ryan, R-Wis. speaks at a news conference at the Capitol in Washington. Republicans are ready to ram through the House an election-year, $3.5 trillion budget that showcases their deficit-cutting plan for revamping Medicare and slicing everything from food stamps to transportation while rejecting President Barack Obama's call to raise taxes on the rich. (AP Photo/J. Scott Applewhite/File)

WASHINGTON (AP) — The House Budget Committee chairman, Paul Ryan of Wisconsin, is expected to endorse Republican presidential hopeful Mitt Romney.

Two Republican officials tell The Associated Press that Ryan's endorsement could come as soon as Friday, when Romney is scheduled to give an economic speech in Appleton, Wis. The officials spoke on condition of anonymity because they were not authorized to speak publicly.

Wisconsin's Republican primary is Tuesday.

Ryan is the author of the House Republican budget that proposes to slash federal spending and shrink government. While the plan is doomed in the Democratic-controlled Senate, it sets out the GOP's fiscal policy.

Romney has praised Ryan's effort to cut taxes and overhaul the tax code.

Ryan has downplayed speculation that he could be picked as the Republican vice presidential candidate.