Rep. Rahm Emmanuel (D-IL) attends an event hosted by the U.S. Global Leadership Council on Capitol Hill on July 16, 2008.

Gay marriage advocates march in the annual Pride Parade in Minneapolis on June 28, 2009.

A man hangs around the free speech zone outside the Democratic National Convention in Boston on July 28, 2004.

On March 20, 2003, the United States invaded Iraq. That afternoon, several thousand protesters descended on downtown Atlanta. This young boy came with his mother. He did not look happy to be there.

Sen. Chuck Grassley (R-IA) speaks to the American Association of Medical Colleges at a breakfast event on Capitol Hill on Sept. 25, 2008. Grassley, the ranking member of the Senate Finance Committee, plays a major role in health care reform efforts.

Sen. Arlen Specter (R-PA) questions Attorney General Alberto Gonzales as he testifies before the Senate Judiciary Committee on Capitol Hill on July 24, 2007.

The Democrats retook control of both Congressional chambers in the 2006 election. The following year, Speaker of the House Nancy Pelosi vigorously pushed the Democratic agenda through the House while Senate Majority Leader Harry Reid was unable to get it passed in the Senate.

President George W. Bush jokes with House Majority Leader Steny Hoyer (D-MD) at a ceremony in the Capitol on July 17, 2007.

Sen. Norm Coleman (R-MN) arrives at a Senate committee hearing on December 11, 2008. Coleman narrowly lost his seat to Democrat Al Franken after an eight month recount battle.

Sen. Arlen Specter of Pennsylvania speaks about a potential investigation of Attorney General Alberto Gonzales for lying to Congress at a press conference on Capitol Hill on July 26, 2007. Specter left the Republican party and declared himself a Democrat in early 2009.