The battlefield for the United States Senate is now fully drawn. With Abdul El-Sayed’s victory in Michigan’s Democratic primary this week, the last major piece fell into place, and Americans can finally see the full slate of contests that will determine whether Republicans keep the upper chamber or hand Chuck Schumer the gavel he has coveted for six years.
What the completed map reveals is more interesting than any single poll number. In state after state, Democratic voters were offered a choice between the establishment and the hard left, and they chose the hard left. The 2026 midterms will not merely test Republican strength. They will test whether America is prepared to send Bernie Sanders’ movement to the Senate in force.
Republicans hold a 53-47 majority, which means Democrats need a net gain of four seats to take control. That is a steep climb on any map. But Liberty Nation News reports that its Public Square polling aggregator currently shows Republicans trailing in every race the Cook Political Report rates a toss-up, along with the one seat Cook considers most likely to flip. Ninety days out, the terrain deserves a closer look, race by race.
North Carolina
The retirement of Sen. Thom Tillis opened the seat Cook rates as the most vulnerable Republican-held prize in the country, and the matchup could not present a starker contrast. Former Gov. Roy Cooper, a fixture of North Carolina politics for four decades, faces Michael Whatley, the former Republican National Committee chairman who helped engineer the 2024 victory and remains a close ally of President Trump. Liberty Nation’s aggregator puts Cooper ahead 49.3 percent to 41 percent as of Wednesday.
That gap explains the money now flooding the state. The Senate Leadership Fund, the super PAC aligned with Majority Leader John Thune, has pledged $71 million to elect Whatley, part of a $342 million national effort, and deployed its first $17 million tranche in late July for a summer ad blitz targeting Cooper’s record on crime and his administration’s handling of Hurricane Helene.
The Democrats’ Senate Majority PAC has answered with more than $30 million committed to Cooper’s defense. Yet the number Republicans should watch is not the spread but the ceiling. Cooper is running his sixth statewide race against an opponent most voters barely know, and he still struggles to crack 50 percent. He underperformed his polling in both gubernatorial victories. A Democrat has not won a Senate seat in North Carolina since 2008, and Whatley’s task is straightforward, if not easy. He must introduce himself to a state that already knows everything about his opponent.
Alaska
Sen. Dan Sullivan’s reelection should have been a formality. Instead, it has become one of the strangest contests in the country, because there are two Dan Sullivans on the ballot. The incumbent, Dan S. Sullivan, faces former Rep. Mary Peltola, the Democrat who briefly held the state’s House seat before losing it in 2024. Then a second man, Dan J. Sullivan of Petersburg, filed to run as a Republican.
The state’s elections director opened an investigation into what she called credible allegations that the challenger entered the race to confuse voters, noting his recent party switch and his ties to a consultant who has worked for Peltola, and initially concluded he could not appear on the ballot. A court ruled otherwise, and the doppelganger remains.