Crowd boos Ryan at AARP

Republican vice presidential nominee Paul Ryan met loud boos and taunts, as well as deep skepticism, as he attacked President Obama's healthcare law at an AARP event Friday.

The unwelcome reception was a clear sign of just how big a challenge Medicare poses to the Romney campaign — and a setback for the idea that Ryan can successfully explain away seniors' concerns.

Read more on The Hill's Healthwatch Blog.