Republicans have retained Senate control for two more years, shattering Democrats' dreams of an anti-Trump wave sweeping them into the majority.
The result was all but assured when Republican Kevin Cramer ousted North Dakota Democratic Sen. Heidi Heitkamp and when Republican businessman Mike Braun ousted Sen. Joe Donnelly in Indiana.
Meanwhile, Sen. Ted Cruz fended off a spirited challenge from Democratic Rep. Beto O'Rourke and Republican Sen. Marsha Blackburn triumphed in Tennessee.
The GOP's gains come even as the results in Nevada and Arizona have yet to be determined.
Meanwhile, Democrats are gaining ground in their fight for control of the House, picking up key seats in Florida, Pennsylvania and Minnesota.
The early wins give Democrats a share of the seats they'll need for House control. They won two seats in Florida, knocking off two incumbents there, and have won three seats in Pennsylvania, where court-ordered redistricting made the terrain more favorable to Democrats. They have also defeated a Republican incumbent in Minnesota.
Democrats need a net gain of 23 seats to win the House.