Ex-Arizona sheriff, Trump ally Joe Arpaio running for Senate

In this Jan. 26, 2016, file photo, Republican presidential candidate Donald Trump is joined by Joe Arpaio, the sheriff of metro Phoenix, during a news conference in Marshalltown, Iowa. Former Phoenix lawman and Trump ally Arpaio says he will run for the Arizona U.S. Senate seat held by Jeff Flake. (AP Photo/Mary Altaffer, File)

In this July 6, 2017, file photo, former Sheriff Joe Arpaio leaves the federal courthouse in Phoenix, Ariz. Arpaio is running for the Arizona U.S. Senate seat being vacated by Republican Sen. Jeff Flake. (AP Photo/Angie Wang, File)

PHOENIX (AP) — Former Arizona sheriff Joe Arpaio has announced he plans to run for the U.S. Senate seat now held by Jeff Flake.

The 85-year-old Arpaio is a Republican and close ally of President Donald Trump.

Arpaio tweeted Tuesday he seeking the post to support Trump’s agenda “in his mission to Make America Great Again.”

Arpaio was spared a possible jail sentence last year when Trump pardoned his conviction for disobeying a judge’s order in an immigration case.

He flirted with the idea running for Arizona governor five times but decided against doing so each time.

Arpaio says in a fundraising email that he filed paperwork Tuesday for the Senate run.

The Republican Flake has been critical of Trump and announced last year that he would not seek another term.