I don't have much in the way of factual evidence, but I get the sense that Democrats are very frustrated and angry at the status quo and are looking for something different, and candidates who can clearly differentiate themselves from the "same old, same old" type of centrist, establishment Democratic pols could do very well in Democratic primaries across the country, even in some red states (whether they can win the general election is an entirely different issue, of course). Mamdani in NYC is a good example. If Talarico is clever and resourceful and savvy enough to illustrate how his opponents are just representing the status quo and he isn't, and he's willing to stand up to Trump in a very vocal and aggressive way, then he might have a good chance of winning the nomination in the current political climate, as I think that message would be very appealing to a lot of Democrats right now. Whether he could win the general election in Texas (or any of these candidates could) is a separate issue.
Yes, they could gain as many as 13 thru redistricting alone, but with some other variables, flips, etc he's thinking they gain 5-8.
Well that's fucking depressing
No, I think he's predicting that the Dem margin will be 5-8 less than it would be without the redistricting.
This is how I interpreted the tweet as well.
In other words, a man without a country in the current political climate.