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Donald Trump is part of the Republican party.

Explanation:Trump has proposed sizable income tax cuts and deregulation consistent with conservative (Republican Party) policies, along with significant infrastructure investment and protection for entitlements for the elderly, typically considered liberal (Democratic Party) policies. His anti-globalization policies of trade protectionism cross party lines.[3] Trump has said that he is "totally flexible on very, very many issues."[4] Trump's signature issue is immigration, especially illegal immigration,[5] and in particular building or expanding a border wall between the U.S. and Mexico.[6] As of October 2016, Trump's campaign had posted fourteen categories of policy proposals on his website, which have been since removed.[7] During October 2016, Trump outlined a series of steps for his first 100 days in office.[8]