Sen. Elizabeth Warren (D-MA) and Sanders are generally considered the progressive candidates with a shot of winning the nomination; former South Bend, Indiana Mayor Pete Buttigieg and former Vice President Joe Biden are more moderate. The differences between the two camps have been on display during campaign speeches and debates.

But new reports show that groups with ties to both Ocasio-Cortez and Sanders have dumped hundreds of thousands of dollars into advertising and protests aimed at the two moderates.

The group Organize for Justice, a not-for-profit sinking over $500,000 into advertising, has ties to a “sister organization,” Justice Democrats. The executive director of Justice Democrats is the president of the board of Organize for Justice. Both Ocasio-Cortez and her campaign chair are former board members of the group.