Even a casual observer of politics has probably heard of Amy McGrath.

The retired Marine fighter pilot made a splash last year with an introductory video about the letters she wrote to members of Congress asking them to change the law so that women could fly in combat.

The video went viral and helped her raise more than double Kentucky GOP Rep. Andy Barr during the third quarter of 2017. She’s been profiled by the national media as one of the female veterans helping shaking up politics this cycle.

But for most of the campaign, she’s run without the backing of many in the Democratic apparatus who have championed female recruits. She supports abortion rights but hasn’t sought the endorsement of EMILY’s List, and the Democratic Congressional Campaign Committee recruited someone else to run against her.

McGrath’s biggest political test so far is on Tuesday, when she’ll face off against Lexington Mayor Jim Gray (and four other candidates) for the Democratic nomination in Kentucky’s 6th District. Gray, the 2016 Democratic Senate nominee, entered the race in December — four months after McGrath — with encouragement from the DCCC.