That takes the math to Democrats winning the majority 219-211 with 5 seats tied based on the latest poll in each of the 31 toss-ups.
Of the 31 current toss-ups, 10 races are +1 either way and 5 are tied, making 48% of the toss-up races just that close.
Of the 10 races +1, they are evenly split Democrat and Republican.
Polling remains out-of-date in 11 races, or 35% of the toss-ups, dating to September. Of those 6 favor the Democrat plus a seventh race is tied. Just four of these 11 races are +1 with one in the Democrat column.
