Democrats net two Senate seats

Democrats increased their Senate majority to 54, with possibility of it reaching 55 seats depending on whether Independent Maine Senator-elect Angus King caucuses with Democrats. No incumbent Democrat lost, though Democrats lost the Nebraska seat previously held by retiring Ben Nelson, the Senate's most conservative Democrat. Democrats were able to take two Republican seats, in Massachusetts and Indiana.

Democrats won all the close Senate races, though only the North Dakota race was decided by fewer than 4 points.