For many on the left, Clinton is the woman who supported the Iraq war, ran to the right of President Obama and is associated with the Wall Street-friendly centrism espoused by her husband, former President Bill Clinton.

Progressives feel they are in a political golden age in which questions about income inequality are growing louder, anti-gay marriage laws are falling and the growing Hispanic electorate regards the GOP with skepticism. Given all that, they don’t want to be stuck with a standard-bearer they see as too centrist…

“If Hillary Clinton embraces the rising economic populist tide in America, there will be little political space for a credible primary challenger,” said Laura Friedenbach of the Progressive Change Campaign Committee. “But if she sides with big corporations against everyday people, there will be a huge amount of political space for some insurgent to run on an economic populist platform.”

“Every candidate who thinks about running will be faced with a whole set of questions, on holding Wall Street accountable, on combatting student debt, on expanding social security,” said Ilya Sheyman, the executive director of MoveOn.Org Political Action. “Whether it’s Secretary Clinton or Sen. Warren or others, all of them are going to have to address the issues that progressives really care about.”