One expert says the Federal Reserve is at its best when it's sending out a signal, light a lighthouse. Mel Evans/AP hide caption
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Republican presidential candidate Jeb Bush speaks during a campaign event in Cedar Falls, Iowa last week. Joshua Lott/Getty Images hide caption
Supporters listen to Republican presidential candidate Rick Santorum at The Ravine in Bellevue, Wis., on March 24. Some voters in the state are complaining about a barrage of negative ads in advance of Tuesday's primary. Darren Hauck/Reuters /Landov hide caption
Foster Friess introduces Rick Santorum at the 2012 CPAC Conference in Washington, D.C. on Feb. 10. Ron Sachs/CNP DPA/Landov hide caption
Stephen Colbert, left, and Jon Stewart held hands as they transferred Colbert's Super PAC to Stewart's control. Kristopher Long/Comedy Central/AP hide caption