Washington: Senator Bernie Sanders announced Tuesday he is running for president, launching a second bid for the White House after a surprisingly strong run for the Democratic nomination in 2016.

Sanders, 77, made the announcement in a radio interview in his home state of Vermont. "I wanted to let the people of the state of Vermont know about this first," Sanders said on Vermont Public Radio. The self-described Democratic socialist joins an already crowded field of candidates seeking to take on President Donald Trump and the Republicans in 2020. Sanders gave an outline Tuesday of how he will campaign.