It is widely held that when the names go into the hat for the 2016 Democrat presidential primary, only one will matter: Hillary Clinton.
Yet some in her party hope the frontrunner could again be upset by a challenge from an outsider - and their preferred candidate appears to be the liberal senator from Massachusetts, Elizabeth Warren.
In its latest cover story, the political magazine New Republic suggests a Warren presidential run would be "Hillary's nightmare", and describes Senator Warren as "the probable face" of a progressive "insurgency".
Warren, 64, has made her name as a critic of the financial industry. Clinton is thought of as being sympathetic to Wall Street; her husband presided over widespread deregulation while in the White House.
If the issue remains at the forefront of voters' minds by 2016, the magazine argues, activist enthusiasm for a Warren candidacy could spread. The publisher of the liberal blog Daily Kos, Markos Moulitsas, told the New York Times: "[Warren] is reshaping the Democratic Party and leading its charge toward a more economic populist orientation."