(The search within ActBlue is not good, at least on mobile, but I find the easiest way is to go to Google and just enter “democratic legislative campaign committee actblue”.)
The question you’re asking is if state legislative races are a “bigger deal than the presidential campaign”?
I’d gladly cede control of 37 state legislatures for another 4 years with President Trump, and the SCOTUS nominations I expect would accompany a second term, if that tells which one I see as a bigger deal.
No no no, the DCCC is different! The Democratic Legislative Campaign Committee is for state legislatures. The DCCC is for congressional races. But the DCCC’s success throughout the 20s will depend a lot on the success of the DLCC in next year‘s elections in closely divided states, because of redistricting.
They’re not independent things. Split ticket voting is becoming less common. So the best thing for the Dems to do is drive turnout as much as possible. If they’re voting for the Dem presidential candidate, they’re going to be voting for the Dem Rep, the Dem Senator, the Dem State Legislator, the Dem Comptroller, etc.
That’s true to an extent. But hundreds of thousands of people in Massachusetts last year voted for Elizabeth Warren’s Republican opponent but still supported Democrats in other races. It’s better than having them support Republicans all the way up and down the ballot.
And look at Florida. It has had many close statewide elections over the past couple decades, but the state legislature has remained stubbornly red.