Sen. Joe BidenJoseph (Joe) Robinette BidenBiden: Trump family separation policy could make the US a pariah Elizabeth Warren can unify Democrats and take back the White House Giuliani doubles down on Biden comments: 'I meant that he’s dumb' MORE (D-Del.) released his first presidential campaign ad Monday, set to air on Iowa television this week. The ad, nicknamed "Cathedral," focuses on withdrawing from Iraq.