Former Vice President Joe Biden, who entered the 2020 presidential race on Thursday, has a history in politics stretching back 50 years, when he was elected to New Castle County Council in Delaware.

Rival candidates have been keeping their power dry until his declaration but view Biden’s record, stretching back to his being first elected to the United States Senate in 1972, and through two unsuccessful presidential campaigns in 1988 and 2008, as full of opportunities for attack.