[603] The impeachment trial was the first in U.S. history without witness testimony.[604]
Trump was acquitted of both charges by the Republican majority, 52–48 on abuse of power and 53–47 on obstruction of Congress. Senator Mitt Romney was the only Republican who voted to convict Trump on one charge, the abuse of power.[605]
Following his acquittal, Trump fired impeachment witnesses and other political appointees and career officials he deemed insufficiently loyal.[606]

2020 presidential campaign
Trump at a 2020 campaign rally in Arizona
Main article: Donald Trump 2020 presidential campaign
See also: 2020 United States presidential debates
Breaking with precedent, Trump filed to run for a second term with the FEC within a few hours of assuming the presidency.[607] He held his first re-election rally less than a month after taking office[608] and officially became the Republican nominee in August 2020.[609]
In his first two years in office, Trump's reelection committee reported raising $67.5 million and began 2019 with $19.3 million in cash.[610] By July 2020, the Trump campaign and the Republican Party had raised $1.1 billion and spent $800 million, losing their cash advantage over Biden.