Sanders to rally supporters in DC
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Bernie SandersBernie SandersWisconsin Supreme Court blocks governor's effort to delay election The Hill's Campaign Report: Biden, Trump discuss coronavirus response; Wisconsin postpones elections Wisconsin governor postpones Tuesday's election over coronavirus MORE will appear at a campaign rally in Washington, D.C., on Thursday despite Hillary ClintonHillary Diane Rodham ClintonWe need to be 'One America,' the polling says — and the politicians should listen Poll shows Biden with 6-point edge on Trump in Florida Does Joe Biden really want to be president? MORE securing enough delegates to clinch the Democratic nomination.  

The Vermont senator's campaign sent out an invitation to a rally in the city's Southeast section to supporters immediately after Clinton finished her victory speech in which she called herself the party's presumptive presidential nominee. 
"Bernie is hosting a rally in Washington, DC on Thursday — don't miss this chance to see him in person! Join us for a conversation about the issues that matter: making college tuition-free, getting big money out of politics, combating climate change, and much more," the email reads.
"With the DC primary coming up on June 14, we need everyone to join the political revolution."
Sanders has said that he'd return to Vermont after Tuesday's primaries to "assess" the campaign's direction, and The New York Times reported that Sanders will be laying off a significant number of staffers. 
Clinton surpassing the threshold, coupled with the Times report, prompted questions as to whether his campaign would be winding down. But the scheduled appearance gives the impression that Sanders will fight on. 
His campaign has argued that he will accelerate his push to flip party superdelegates over to his side in order to mount an upset at the Democratic convention. But to do so, he'd need to win over the majority of the party leaders already backing Clinton along with almost all of those who haven't declared a preference yet, an all but impossible feat.
All delegates, including those bound by primary elections and the superdelegates, will formally choose the nominee at the Democratic National Convention in July.