The Republican mayor of Sterling Heights, Mich., the fourth-biggest city in the state, is abandoning his support of President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE and endorsing former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE for president.

Michael Taylor, who cast his 2016 ballot for Trump, first told The Chicago Tribune of his decision on Monday, saying that he felt “Biden is the candidate who can unify all of the Democrats" and "appeal to moderates and Republicans like me who don’t want to see four more years of Trump."

He added in a tweet that he couldn't look at his three kids and tell them that he supported the president, whom he described as "deranged."

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"I can't. I won't. I'm voting for Biden and endorsing him for President of the United States. I hope you'll join me," he said just a day before Michigan's presidential primary.

How could I look at those three kids and tell them I'm proud to support Donald Trump? I can't. I won't. I'm voting for @JoeBiden tomorrow and endorsing him for President of the United States. I hope you'll join me. #Biden2020#MichiganPrimary https://t.co/GIA3PT5DNS — Michael C. Taylor (@MayorMikeTaylor) March 9, 2020

Taylor's endorsement comes a week after Biden surged ahead of the rest of the field and earned decisive Super Tuesday victories in states throughout the South. The field has since winnowed to essentially a two-man race between Biden and Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.), who won the Michigan Democratic primary in 2016.

Taylor's vote on Tuesday will represent the first time he's ever supported a Democrat, the Tribune noted. Michigan's open primary system allows registered voters to participate in whichever party's primary they choose.

His public endorsement of Biden is significant considering Sterling Heights is within Macomb County, a battleground area that has flipped its support between Democrats and Republicans over the last decade. A majority of the county backed former President Obama in 2008 and 2012, only to place its support behind Trump in 2016.

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Michigan, which Trump won in 2016, is considered one of the keys to either a Trump or a Democratic victory in November.

Taylor, who has served as mayor since 2014, said that in 2016 he voted for Trump thinking that the then-candidate's behavior would improve.

"He’s even more deranged now than I thought then. So, I take the blame. I voted for him," he told the Tribune, adding that he believes some of his constituents could be swayed into supporting Biden if he showcases to them why he's the best fit for the job.

“[Biden] says he’s fighting for the soul of our country, well, he’s gotta act like it and come here and tell people, ‘I can help you,’” he said. “'These Trump economic policies, I got better ones, we’re going to make your wages, your life better here.'”