Kind of, it’s more important to actual check where a candidate or sitting politician got their campaign funding. That’s the way to know if it’s a corpo Republican Lite or an actual progressive.

Opensecrets.org is a great resource for this, just go to the campaign finance section and look up a politician.

Makes it easy to avoid voting for people who take AIPAC money and stuff.

Although, it should be noted that AIPAC funnels money through other groups like “Voters for Responsive Government”, so you have to do a bit of research sometimes, but you get the idea. Most progressives should be majority grassroots small donations.