Rep. Joe Crowley, the fourth-highest Democrat in Congress, has served since 1999. That all ended tonight when his 28-year-old challenger, Alexandria Ocasio-Cortez, beat him in their primary for New York's 14th district.
This is a huge deal. And it's perhaps the biggest upset we've seen since David Brat beat then-House majority leader Eric Cantor in 2014. Crowley's defeat is the clearest example yet that the Democratic Party's progressive wing is only getting stronger under Trump.