Senate Races to Watch Ahead of Election Day

As the election cycle began, Democrats were viewed as longshots to take control of the Senate because many contested seats are located in red states. However, as the year has progressed and the conflict in Iran has continued, the map has expanded significantly, with polling and ad spending pointing to competitive contests in areas President Trump won by double digits in 2024.

Competitive Races and Party Perspectives

According to the Cook Political Report, races in Alaska, Iowa, Kansas, Ohio, and Texas are all classified as Toss Ups, and contests in all of these Trump-won states remain within the margin of error. Sen. Kirsten Gillibrand, D-N.Y., chairwoman of the Democratic Senatorial Campaign Committee, expressed enthusiasm about the wide field of candidates running and winning in deep red and purple areas, telling NPR, “People want change, and we have so much talent on the field right now. I feel very inspired.”

Republicans hold a different perspective on the current political landscape. Bernadette Breslin, national press secretary for the National Republican Senatorial Committee, criticized Democrats by stating, “Senate Democrats’ socialist surge has reached a fever pitch, and their desperate conspiracies to defraud voters appear criminal.” Breslin pointed to a controversy in the Alaska Senate race regarding the alleged involvement of the campaign for Democratic candidate Mary Peltola in recruiting Daniel J. Sullivan to run against incumbent Republican Dan Sullivan, as first reported by The New York Times. Breslin also stated, “Common-sense voters across red-leaning battlegrounds are preparing to reject the dangerously unaffordable agendas of Abdul El-Sayed, Troy Jackson, and Mary Peltola—along with the Democrat Party’s dying brand.”

Shifting Battlegrounds and Control Dynamics

Shifting political winds have turned North Carolina—where Trump won narrowly and which started as a Toss Up—into a likely flip for Democrats, while Georgia has shifted from a top Republican target to a likely hold for Democrats. Even South Carolina, won by Trump by 18 points, is currently leaning toward the Republican Party, and Mississippi and Nebraska have grown more competitive while still favoring GOP candidates.

Democrats need a net gain of four seats currently held by Republicans to secure Senate control, though accomplishing this is not guaranteed. Republicans retain targets in Michigan, New Hampshire, and Minnesota, and winning even one of those would complicate Democratic math. The outcome depends heavily on Republican turnout, where low turnout could make the difference between a small net gain or picking up six or seven seats.

Tier Ratings for Senate Contests

The competitive states are grouped into tiers ranked from most to least likely to flip, based on ratings from the Cook Political Report:

• Tier 1: North Carolina (R)
• Tier 2: Michigan (D), Ohio (R)
• Tier 3: Alaska (R), Iowa (R), Maine (R), Texas (R)
• Tier 4: Kansas (R), Minnesota (D), New Hampshire (D), South Carolina (R)
• Tier 5: Mississippi (R), Nebraska (R), Georgia (D)

In Tier 1, North Carolina features retiring Republican Sen. Tillis with former Gov. Roy Cooper considered likely to win the seat. In Tier 2, Michigan is an open Toss Up race testing progressive Abdul El-Sayed against former moderate Rep. Mike Rogers, while Ohio is a Toss Up featuring former Democratic Sen. Sherrod Brown challenging incumbent Republican Sen. John Husted amid economic concerns.

Tier 3 includes Alaska, where a late recruiting scandal threatens Mary Peltola’s momentum; Iowa, where Democrat Josh Turek faces Republican Rep. Ashley Hinson amid agricultural challenges; Maine, where Republican Sen. Susan Collins faces Troy Jackson in the only 2024 Harris-won Toss Up state; and Texas, where state Rep. James Talarico faces MAGA-aligned Attorney General Ken Paxton after massive spending totals exceeding $500 million.

Tier 4 features Kansas, where incumbent Republican Sen. Roger Marshall faces pastor Adam Hamilton; Minnesota, where Democratic nominee Lt. Gov. Peggy Flanagan navigates a Medicare fraud oversight controversy; New Hampshire, where Democrat Rep. Chris Pappas remains a slight favorite; and South Carolina, where political novice Darline Graham runs against Democratic nominee Annie Andrews following the death of Sen. Lindsey Graham. Tier 5 includes likely Republican holds in Mississippi and Nebraska, alongside Georgia, where Democratic Sen. Jon Ossoff enters as a heavy favorite.