A number of U.S. political videos are spreading quickly this week.

Today, candidate Newt Gingrich gave advance notice to his supporters via a YouTube video that he will be dropping out of the presidential race this week. It's quickly seeing pick up on political blogs and news sites:



Meanwhile, President Obama revealed his campaign slogan for the 2012 election in this top trending video and 7-minute documentary.



The President also has had two other very popular videos/appearances hit our trending feeds this week: his "duet" with Jimmy Fallon "Slow Jamming the News" and his remarks at this past weekend's White House Correspondent's Dinner.

For his part, GOP candidate Mitt Romney also has a video on our most-shared list right now: a critical spot called "Broken Promises."