A group of influential progressive intellectuals are giving Democratic presidential nominee Hillary Clinton their seal of approval ― and urging fellow progressives, including those who supported Sen. Bernie Sanders (I-Vt.) in the Democratic primaries, to do the same.

In a letter that went public on Tuesday and was provided in advance to The Huffington Post, more than 50 progressive economists and other policy experts endorse Clinton’s candidacy ― not simply as a way to defeat GOP presidential nominee Donald Trump, but also as a way to advance a liberal economic agenda.

The letter warns that “drastic increases in income inequality have created a deep malaise among many Americans who are increasingly excluded from the promise of a better future.” Then it offers an overview of Clinton’s proposals ― including a higher minimum wage, big spending on infrastructure and new early childhood education programs ― that are designed to bolster economic fortunes for the poor and middle class.

Many, and probably most voters don’t know about Clinton’s agenda. And those who do may not have faith she’ll pursue those policies in office. This is particularly true for voters who supported Sanders in the primary and know Clinton primarily through her associations with Wall Street and her public statements in favor of her husband’s legislative achievements, including the expansion of free trade and imposition of time limits on welfare.

The letter does not mention Sanders explicitly. But Martin Carnoy, a Stanford economist who helped draft and gather signatures for the letter, said one of his goals was “to reassure progressives that Clinton is committed to the [progressive] agenda we have listed.”

The figures behind the letter may help with that. Carnoy’s partners in the enterprise were Robert Reich, a former labor secretary who is now a professor at the University of California, Berkeley, and Derek Shearer, a former ambassador to Finland who is now a professor at Occidental College.