Top Progressive Super PAC Throws Support Behind Hillary Clinton

Priorities USA will back her if she runs in 2016

One of the most potent outside liberal-oriented political groups announced on Thursday that it would back Hillary Rodham Clinton if she chooses to seek the White House in 2016, the latest sign that senior members of President Barack Obama's team were looking to line up with the former first lady.

Priorities USA brought on board Jim Messina, Obama's 2012 campaign manager and the latest Obama insider to join a pro-Clinton group. With so many Obama veterans lining up to help clear the way for a Clinton campaign, it perhaps adds pressure on Clinton to go forward with another White House bid.

Clinton, a former secretary of state, senator and first lady, has not yet decided if she will again seek the White House. But that has not stopped supporters from building a political machine in case she decides to turn the key.