Brendon O’Connor | Source | Associate Professor at United States Studies Centre

US Studies Centre’s Associate Professor Brendan O’Connor says former Vice President Joe Biden had an “amazing turnaround” in the Democratic presidential primary and is the clear frontrunner to win his party's nomination. Vice President Biden won three key states on Wednesday, Australia time, including a vital victory in Michigan. Mr O’Connor told Sky News Senator Sanders is “now looking in a very vulnerable position” and will really have to outperform Biden in an upcoming debate in an attempt to close the growing gap between them. He said Biden has “come back from the dead” after his “candidacy looked to be going desperately in the wrong direction”. Image: AP