Story highlights Sen. Jeff Flake, a Republican, has long feuded with President Donald Trump
Flake faced a GOP primary challenger next year and a tough re-election fight
Watch Sen. Jeff Flake on CNN's "The Lead with Jake Tapper" Tuesday at 4 p.m. ET.
Washington (CNN) Republican Sen. Jeff Flake of Arizona will not run for re-election, saying Tuesday he wouldn't embrace President Donald Trump to win next year's Republican primary.
"Here's the bottom line: The path that I would have to travel to get the Republican nomination is a path I'm not willing to take, and that I can't in good conscience take," Flake told The Arizona Republic.
He intends to detail his decision to retire on the Senate floor on Tuesday, the newspaper reported.
Will Allison, Flake's campaign spokesman, confirms to CNN that he is not running.
His decision means Flake joins retiring Tennessee Sen. Bob Corker as an outspoken critic of Trump with nothing to lose in the year before 2018's midterm elections.
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Arizona Senator Jeff Flake announced on Tuesday he will not seek reelection when his term in the  is up next year, citing issues within the United States Republican Party and with President Donald Trump, whose behavior he called "reckless, outrageous, and undignified." The Trump administration said Flake had poor support among his constituency.

In a speech on the floor of the Senate, Flake said, "The notion that one should stay silent as the norms and values that keep America strong are undermined and as the alliances and agreements that ensure the stability of the entire world are routinely threatened by the level of thought that goes into 140 characters — the notion that one should say and do nothing in the face of such mercurial behavior is ahistoric and," he said, "I believe, profoundly misguided." He later added on CNN's '''', "It's difficult to move forward in a Republican primary if you have been critical of any of the behavior that's gone on... We Republicans certainly can't countenance that kind of behavior. We ought to stand up and say 'This is not right. This is not us. This is not conservative.' "
Senator Jeff Flake in 2016.
"Based on the lack of support he has from the people of Arizona, retirement's probably a good move,"   told the media. Recent polls showed Flake has limited popularity with Republicans in Arizona.

Last year President Trump told other Arizona politicians he planned to personally spend US$10 million to see that Flake did not win the Republican primary, the intra-party election that names the party's official candidate. About two months ago Trump tweeted in support of Flake's rival for the primary nod, , "Great to see that Dr. Kelli Ward is running against Flake Jeff Flake, who is WEAK on borders, crime and a non-factor in Senate. He's toxic!"

Republican Senators  and , who have also been critical of President Trump, stood and clapped at the end of Flake's floor speech. Corker later called Flake a "real conservative." Republican Senator  of Maine described herself as deeply disappointed by Flake's decision. Republican Senator  and  Senator  referred to it as "sad" and "depressing."

Kaine commented, "When someone as good and decent a person as Jeff Flake does not think he can continue in the body, it's a very tragic day for the institution."

Flake has recently published a book, ''Conscience of a Conservative: A Rejection of Destructive Politics and a Return to Principle'', in which he criticizes what he sees as Trump's negative effect on the tone of United States politics. Politically, Flake has differed from President Trump on trade and immigration, specifically the  and the , with Flake in favor of both agreements and Trump against.  Flake also co-authored a 2013 law that would have given undocumented immigrants a path to citizenship if it had passed. Trump is in the early stages of building a wall on the U.S.– border in an attempt to prevent people from entering the U.S. illegally and has issued three executive orders limiting immigration from specific countries, though these were later blocked.

United States senators serve six-year terms.  One third of the Senate is elected or reelected every two years.



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CAT:United StatesCAT:Politics and conflictsCAT:ElectionsCAT:Republican Party (United States)CAT:ArizonaCAT:Donald Trump