The problem with O’Rourke, various Democratic activists say, is that he didn’t support bills they consider to be crucial to the progressive platform and he was a member of the centrist, fiscally conservative New Democrat Coalition.

O’Rourke supports universal health care, but his campaign website doesn’t mention Medicare for All and he didn’t co-sponsor the House bill for it. (He’s explained why on Facebook and said he’s “exploring an alternative.”)

He supports protecting Social Security, but he didn’t sign the House bill for it.

He’s not on the bill for debt-free college, which will become a litmus test for 2020 Democrats among progressives.

He supports reforming the current bail system, but not abolishing it completely.