The day after he single-handedly delayed the U.S. Senate’s debate on President Joe Biden’s $1.9 trillion COVID-19 relief bill for 11 hours, Republican Senator Ron Johnson said on Friday that he could retire from office when his term expires.

The two-term Republican told Wisconsin media outlets that he has not decided whether to run for reelection in 2022 but added that not seeking another term is ā€œprobably my preference now.ā€

Johnson, a Trump ally, recently drew widespread criticism by peddling a debunked conspiracy theory that leftists posing as Trump supporters played a role in the deadly Jan. 6 attack on the U.S. Capitol. Political analysts say his seat could be vulnerable to Democrats next year.

The 65-year-old Republican, who was first elected to the Senate during the Tea Party surge in 2010, had pledged to spend only two terms in the Senate.

ā€œThat pledge is on my mind, it was my preference then, I would say it’s probably my preference now,ā€ Johnson told reporters. ā€œI’m happy to go home.ā€

But he added a caveat. ā€œI think that pledge was based on the assumption we wouldn’t have Democrats in total control of government and we’re seeing what I would consider the devastating and harmful effects of Democrats’ total control just ramming things through,ā€ the Wisconsin State Journal quoted him as saying.

(Reporting by David Morgan and Makini Brice; Editing by Scott Malone and Daniel Wallis)