Why It Matters
Control of the U.S. Senate may hinge on a handful of competitive races across Alaska, Ohio, North Carolina, and Maine, where shifting candidate dynamics are prompting forecasters to revise their outlook heading toward November. Republicans currently hold a 53-47 Senate majority, and Democrats need a net gain of seats to take control.
What Happened
Sabato’s Crystal Ball, a widely followed election forecasting outlet, moved three Senate contests — in North Carolina, Alaska, and Ohio — in the Democratic direction. The adjustments reflect strengthening Democratic candidate fields and vulnerabilities on the Republican side in each state.
Four races are now classified as pure toss-ups: Alaska, Ohio, Maine, and Michigan. Democrats are considered favored in competitive contests in Georgia, New Hampshire, and Minnesota.
Forecasters Kyle Kondik and J. Miles Coleman noted that the changes make “Democrats’ path to the majority clearer, but we still favor Republicans in the overall race for the Senate.”
Race-by-Race Breakdown
North Carolina: With Republican Sen. Thom Tillis retiring, former Gov. Roy Cooper won the Democratic primary in March and will face Michael Whatley, the former Republican National Committee chairman, in November. Cooper’s statewide name recognition and executive record make the open seat competitive.
Ohio: Former Democratic Sen. Sherrod Brown is pursuing a fourth term after being ousted two years ago by Republican Bernie Moreno. He now faces Sen. Jon Husted, who was appointed to the seat following JD Vance’s departure after the 2024 presidential election. Brown’s history of winning in a Republican-leaning state keeps the race on forecasters’ radar despite his previous defeat.
Alaska: Former U.S. Rep. Mary Peltola, a Democrat who made history in 2022 by becoming the first Democrat to represent Alaska in the House in roughly half a century, is challenging incumbent Republican Sen. Dan Sullivan. Peltola’s initial House victory came via special election, and her political durability in a state that typically leans Republican makes the Sullivan race more competitive than it appeared a cycle ago.
Maine: The Democratic primary concluded June 9 with Graham Platner, a Marine Corps veteran and political newcomer, emerging as the nominee after Gov. Janet Mills suspended her own primary campaign. Crystal Ball analysts described Platner as featuring characteristics of an anti-establishment candidate, writing that he “may wind up being Democrats’ answer to weak, outsider GOP nominees” — a reference to 2010 and 2022 cycles when unconventional Republican candidates cost the party Senate seats they were expected to win. Maine remains a toss-up.
Michigan: The open seat race is expected to carry a toss-up designation until at least August 4, when the Democratic primary takes place. U.S. Rep. Haley Stevens has been identified by analysts as the strongest Democratic general election candidate in the state. Abdul El-Sayed leads in some recent Democratic primary polling but performs weakest in head-to-head matchups against Republican former Rep. Mike Rogers.
By the Numbers
Republicans hold a 53-47 Senate majority entering the 2026 cycle. Four contests are rated pure toss-ups. Democrats are favored in at least three competitive races. Michigan’s primary falls on August 4, potentially reshaping that state’s general election trajectory. The last time Alaska sent a Democrat to the U.S. House was more than 50 years before Peltola’s 2022 victory.
Zoom Out
The 2022 midterm cycle illustrated how candidate quality can override structural political advantages. Republican nominees in several states underperformed expectations, costing the party seats that polling suggested were within reach. Forecasters are applying that lesson to 2026, weighing whether strong Democratic candidates in traditionally red or purple states can replicate those outcomes — and whether Republicans can avoid nominating candidates who alienate general-election voters.
What’s Next
Michigan’s August 4 Democratic primary will be a key marker. If Haley Stevens secures the nomination, forecasters may reassess that race’s competitiveness. In Alaska, the contest between Peltola and Sullivan will test whether her House-level appeal translates to a statewide Senate race. North Carolina and Ohio are expected to remain closely watched through the fall as both parties commit resources ahead of November.