I'm curious about what's going on here. Could you give me some context on who many of these people are? Aside from AOC and Clinton, I don't recognize those names.
Well, AOC won NY-14, obviously.
The other key race was NY-16, where Eliot Engel (a corporate, war hawk Dem who has held the seat for 31 years and was ranking member of the House Foreign Affairs Committee) was successfully primaried by progressive challenger Bowman. Engel wasn't particularly popular among his constituents and progressives writ large, because he actually lived in MD and just had a residence in the district for the sake of eligibility, and spent practically zero time in the district let alone to listen to constituents. Moreover, he recently planted his foot right in the shit being caught on a hot mic basically saying he only gave a shit about BLM protests because it was an election year.
NY-17 gets a special notation, because it was an open seat and the candidate field was basically a clown car of usual suspect Democrats, the big three being a prosecutor, an Obama admin official, and a state senator. The progressive candidate, Jones, basically blew everyone else out of the water.
The VA-1 primary was noteworthy because Rashid is a Muslim immigrant lawyer, and a Justice Democrats/DSA candidate (more or less) running against an "anointed one" Democratic candidate.
The CO primary is a strange pickle. Romanoff was a Clinton Democrat, and if anyone remembers he's the one who was involved in the pay-for-play scandal with the Obama administration back in '09 (he was offered a position in the administration to not challenge Michael Bennet); since then he's "drifted left", which really means "he stayed in place while the Democrats yeeted right". He's not a perfect candidate, but on the other hand he's hardly a corporate Democrat neck-deep in corruption allegations who's pledged to block the GND.
The KY Senate race is the one to watch, and that's where Booker comes in. He's running against Amy McGrath, to challenge McConnell in November. McGrath's cunning "plan" is to run to McConnell's right as a pro-Trump Democrat, because national Democrats "have it in their head" the only way to beat McConnell is to out-moron him and try to undermine his support in rural and eastern Kentucky. And as you'd expect, basically all her support and funding is coming from out of state and from corporate/conservative/GOP donors, and in-state Democrats are pretty much all behind Booker especially once people started noticing he had startlingly-high approval ratings in rural and eastern Kentucky.
In other words, national Democrats have no intention of actually beating McConnell, and prefer having him around to keep the campaign cash flowing, while having a convenient bogeyman to blame any time Democratic Senators shit the bed. If you're a corporate Democrat, the very last thing you want is anyone but McConnell's ass in the Senate Majority Leader's chair. Which is exactly why McConnell's opposition in every Senate race since '96 has been a laundry list of the most wet noodle, piss-rag, electoral lost-causers they can find in the state. If you're up against McConnell, having the party's support basically means you're jobbing; you're not there to win, you're there to convince people you're
trying to win.
Why establishment Democrats are throwing everything including the kitchen sink at Booker, is because of two things. First, for the party elites, he has zero intention of throwing the race if he's nominated and if he makes it past McGrath he can easily beat McConnell. Second, for everybody else is the fact he's black, and not just black, from "the wrong part of Louisville"; Booker has a bigger shot of bringing eastern and rural Kentuckian voters back into the fold because he'll bring populist fire to the race and that's going to play well in coal country, and most of the racists in Kentucky are straight-ticket Republican voters nowadays and wouldn't punch a (D) ticket if you ran Nathan Bedford Forrest's corpse on it.