Though Republicans have closed the gap in the generic congressional ballot, the Cook Political Report notes that “most new district-by-district fundraising and polling numbers are downright terrible for Republicans, even in seats previously thought to be safe.”

“This week, we’re shifting our ratings in 21 races towards Democrats. If anything, that still understates Democrats’ potential in individual races. If Democrats win the national House vote by six points (as today’s polls indicate), House control would be a coin flip. But according to our new ratings, if each party were to win an even number of Toss Up races, Democrats would only win 13 or 14 seats — ten shy of the 24 they need.”