U.S. Sen. Thom Tillis of Huntersville has released a memoir sharply critical of President Donald Trump's inner circle, predicting Republicans face an "electoral bloodbath" in November's midterm elections.

The 223-page book, "How to Lose Friends and Antagonize Presidents," covers the 66-year-old Republican's 21-year career in the North Carolina House of Representatives and U.S. Senate, including four years as state House speaker. Tillis will retire in January.

Spectrum News, which received an early copy, reported that Tillis focuses his sharpest criticism on Trump's appointees rather than the president himself. The book's cover features photos of former Department of Homeland Security Secretary Kristi Noem, Defense Secretary Pete Hegseth and Health and Human Services Secretary Robert F. Kennedy Jr.

"I am writing this book to save my party from itself," Tillis wrote, according to Spectrum News. "And to save the president from the temptation and tragedies being set upon him by MAGA extremists."

Tillis wrote that his biggest regret is voting to confirm Hegseth as defense secretary. He said he was called to the White House to meet with Vice President JD Vance and others who pressured him to support the nomination.

The senator also defended his vote against the administration's tax and spending legislation known as the One Big Beautiful Bill. He said the Medicaid cuts would hurt recipients and the North Carolina budget. After he voted "no" on a procedural vote and Trump threatened on social media to back a primary challenger, Tillis wrote that he texted his staff and announced he would not seek reelection.

Tillis said one of his proudest accomplishments was helping secure full federal recognition for the Lumbee Tribe of North Carolina in 2025, a fight the tribe had waged for more than 125 years. The News & Observer reported that Tillis wrote about sitting in his office with tribal members to discuss the effort and later wearing a bolo tie gifted by tribal leadership aboard Air Force One to signal his commitment to Trump.

Tillis predicted Republicans will suffer major losses in November. He said he hopes the party holds the Senate but sees risk it will not. Michael Whatley, a former chair of the Republican National Committee whom Trump tapped to run for Tillis' seat, faces Democrat Roy Cooper, according to WFAE.

After leaving the Senate, Tillis said he will likely rejoin the business world. Before entering politics, he was a partner at PricewaterhouseCoopers. He also said he is interested in founding or joining a group aimed at pushing politicians on the far left and far right out of elected office, WFAE reported.

Tillis, whose political career began as a Cornelius commissioner, will also serve as a leader-in-residence at Davidson College's Martin Institute for Public Good, making campus visits over the coming year alongside former U.N. Ambassador Susan Rice and Arab American Institute President James Zogby, according to Davidson College.

His Senate term ends in January.