给定一篇英文文章，生成一个简短的摘要。
文章内容：
The 2020 United States presidential election was the 59th quadrennial presidential election, held on Tuesday, November 3, 2020. The Democratic Party nominee, former Vice President Joe Biden, and his running mate, incumbent U.S. Senator from California Kamala Harris, defeated the incumbent President, Republican Donald Trump, and his running mate, incumbent Vice President Mike Pence. Biden became the oldest person ever elected to the presidency, as well as the first challenger to defeat an incumbent president in 28 years.
In the 2020 US presidential election, Joe Biden and Kamala Harris of the Democratic Party defeated Republican incumbents Donald Trump and Mike Pence, making Biden the oldest person elected to the presidency and the first challenger to defeat an incumbent president in 28 years.