On the trail: Biden launches biggest ad blitz of his campaign, Sanders attacks amid 'bloodbath' warning

U.S. Democratic presidential candidates Joe Biden and Bernie Sanders campaigned in the Midwest on Saturday, as the two prepare for a showdown in Michigan, Missouri and four other nominating contests next week.

On the trail: Biden launches biggest ad blitz of his campaign, Sanders attacks amid 'bloodbath' warning
U.S. Democratic presidential candidates Joe Biden and Bernie Sanders campaigned in the Midwest on Saturday, as the two prepare for a showdown in Michigan, Missouri and four other nominating contests next week.