Fresh off a series of losses, the Bernie Sanders campaign has started laying off staffers in field offices across the country, a bad sign for the campaign’s future prospects as it reaches the final stretch of a contentious primary season.

Politico reports that while the exact extent of the layoffs is unknown, the majority of cuts affect staffers in states that recently held their primaries. Staffers in Pennsylvania, Maryland, Delaware, Rhode Island, and Connecticut were among those told to look for work elsewhere instead of following the campaign on to upcoming states.

In a statement, campaign communications director Michael Briggs said the cuts are a strategic move now that the primary season is coming to a close. “This is a process that we’ve done before of right-sizing the campaign as we move through the calendar,” he said.

The hundreds of layoffs come just hours after Sanders lost four out of the five primary states that voted Tuesday. While he has promised to continue campaigning until the convention, where he has said he will attempt to force a second round of balloting by convincing Clinton’s super-delegates to vote for him, Sanders also recently signaled that he may be winding down attacks on the former secretary of state in order to focus his remaining leverage on forcing changes to the Democratic Party’s platform.

Though Sanders could hold another round of fund-raising—his donors are notoriously good at money bombs, capable of flooding his war chest with more than $40 million a month—his campaign is equally good at spending it, and has one of the highest burn rates in the race. How much cash Sanders currently has on hand is not public knowledge.