It’s a red wave. Pat Toomey’s narrow re-election in Pennsylvania sealed a Republican majority in the U.S. Senate, as the GOP overcame an unfavorable map. Wisconsin’s Ron Johnson, North Carolina’s Richard Burr and Florida’s Marco Rubio were among the endangered senators who survived tough challenges. Elsewhere, Illinois’ Mark Kirk fell to Democrat Tammy Duckworth and Nevada Democrat Catherine Cortez Masto became the first Latina elected to the Senate. While Democrats entertained hopes for the House a couple months ago, Republicans have kept hold of the lower chamber with ease.