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 hit Democrats over their environmental policies and touted unspecified new manufacturing plants in Michigan in a message on Twitter sent a few hours before the results of the Wolverine State’s crucial presidential primary are expected to be seen.

Michigan is one of three states that had voted for Democrats in recent presidential elections but went to Trump in 2016.

"If you like automobiles, how can you vote for a Democrat who all want to get rid of cars, as quickly as possible, especially if they are powered by gasoline," Trump wrote in the tweet. "Remember also, no more than one car per family. I, on the other hand, have new plants being built all over Michigan, Plus!"

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The president did not elaborate on precisely which plants he was referencing.

If you like automobiles, how can you vote for a Democrat who all want to get rid of cars, as quickly as possible, especially if they are powered by gasoline. Remember also, no more than one car per family. I, on the other hand, have new plants being built all over Michigan, Plus! — Donald J. Trump (@realDonaldTrump) March 10, 2020

Trump and his Republican allies have repeatedly criticized Democrats over the Green New Deal, a sweeping environmental plan that is favored by the progressive wing of the party. An early draft of the plan indicated that massively expanding electric vehicle manufacturing would be a priority to help make internal combustion engine vehicles obsolete.

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Republicans have often panned the proposal as unrealistic and potentially harmful to Michigan and other manufacturing states. Michigan relies heavily on the auto industry to prop up its economy and provide jobs to Michiganders.

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 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.) are embroiled in a fierce battle in the Michigan primary, which Sanders won narrowly over Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE in a 2016 upset. However, a streak of recent polls has shown Biden with a double-digit lead.

Sanders, a staunch progressive, has made the Green New Deal a cornerstone of his environmental policy, while Biden has proposed a $1.7 trillion plan to achieve 100 percent clean energy and net-zero emissions by 2050 but allows for a role for fossil fuels during the transition.