The Cook Political Report shifted 10 House seats in Democrats' favor this week. There are now 60 competitive seats (54 held by Republicans) and 26 toss-up seats total.
Between the lines, from Cook's Dave Wasserman: Republicans would keep the House if both parties picked up an even amount of the toss-ups, but Democrats would take the House and net 28 seats if the competitive seats split evenly.
One race to watch: Maine's 2nd district, which shifted to a toss-up and where Democrats are trying (again) to oust Republican Rep. Bruce Poliquin. Wasserman reports that district hasn't voted out an incumbent in 102 years.