Gary Peters Michigan

Major US Senate Turnover Coming In 120th Congress (2027-2029)

The nation will witness a major US Senate turnover in the upcoming 120th Congress (2027-2029).

This would be due to retirements, primary defeats, potential election defeats, and 4 Senators running for Governor.

For now, the following is certain:

The following 11 US Senators are retiring:

Republican Tommy Tuberville of Alabama, running for Governor
Democrat Dick Durbin of Illinois
Republican Joni Ernst of Iowa
Republican Mitch McConnell of Kentucky
Democrat Gary Peters of Michigan
Democrat Tina Smith of Minnesota
Republican Steve Daines of Montana
Democrat Jeanne Shaheen of New Hampshire
Republican Thom Tillis of North Carolina
Republican Alan Armstrong of Oklahoma, appointed temprarily to replace Markwayne Mullin
Republican Cynthia Lummis of Wyoming

The following two US Senators were defeated in primaries:

Republican Bill Cassidy of Louisiana
Republican John Cornyn of Texas

The following seven US Senators are endangered for reelection:

Republican Dan Sullivan of Alaska, challenged by Mary Peltola
Republican Ashley Moody of Florida, challenged by Alex Vindman
Democrat Jon Ossoff of Georgia, challenged by Republican nominee
Republican Susan Collins of Maine, challenged by Graham Platner
Democrat Ed Markey of Massachusetts, challenged by Seth Moulton in primary
Republican Pete Ricketts of Nebraska, challenged by Independent Dan Osborn
Republican Jon Husted of Ohio, challenged by former Senator Sherrod Brown

Likely gains for Democrats seem possible or likely in

Alaska, North Carolina (open seat), Maine, Ohio, and with outside chances in Texas (open seat), Iowa (open seat), Montana (open seat), and Florida.

But Republicans have possibilities in Georgia, Michigan (open seat), and New Hampshire (open seat).

Also, the following US Senators are running for Governors of their states, and if elected, would resign from the Senate, and a replacement would be appointed or elected:

Democrat Michael Bennet of Colorado
Democrat Amy Klobuchar of Minnesota
Republican Marsha Blackburn of Tennessee

IF all of the above were to occur, the maximum number of new US Senators, either by election or appointment for replacements, could reach the mid 20s in number.

Imagining about 20 new Senators as a minimum, is very likely to occur!

Democratic US Senate Races In 2026 Seen As “Safe” For Incumbents

With 35 US Senate races up for election in November, 2026, the following Democratic Senators are seen as having “safe” seats:

John Hickenlooper, Colorado
Chris Coons, Delaware
Cory Booker, New Jersey
Ben Ray Lujan, New Mexico
Jeff Merkley, Oregon
Jack Reed, Rhode Island
Mark Warner, Virginia

Also, Ed Markey, Massachusetts, who, however, is being challenged by fellow Democrat, Congressman Seth Moulton, mostly on the issue of age.

The following Senate seats that are Democratic are likely to remain so, but with challenges from Republicans:

(Dick Durbin), Illinois, who is retiring–with Congressman Raja Krishnamoorthi far ahead of competitors in fund raising and polling.

(Gary Peters), Michigan, who is retiring–with a hot three way race of Congresswoman Haley Stevens, who has the private support of Democratic Senate leadership; State Senator Mallory McMorrow; and former Wayne County, Michigan Health Director Abdul El-Sayed. Stevens is seen as centrist, while McMorrow and El-Sayed are seen as more progressive by comparison, and all three are 39-42 in age, so a new generation for sure, no matter who wins the nomination. All three are very close in public opinion polls, but Stevens seems to have a clearcut edge at this point.

(Jeanne Shaheen), New Hampshire, who is retiring–with Congressman Chris Pappas the only viable candidate for the Democrats–facing a likely challenge from former Republican Senator John Sununu.

Finally, the one most crucial race is Jon Ossoff of Georgia, who has the toughest race of all, to keep his seat. The youngest member of the Senate, he has been outstanding, but Georgia will be a tough state to win reelection in 2026, as it tends to be Republican oriented, except for the miracle that both Georgia Senators elected in 2021 are Democrats—Ossoff, and Raphael Warnock.