For the second time in as many weeks, Senator Bernie Sanders made a surprise stop in San Francisco, speaking downtown at a labor union and perhaps making more stops into Wednesday evening. Sanders spoke outside 101 California this afternoon, as Hoodline reported, at 4:30 p.m., and this is ahead of a big last-minute rally in Vallejo that was just announced. KTVU has it that that event could see as many as 18,000 people (but who knows if they're just going by Facebookers saying they're "going.")

Sanders made a big speech Tuesday in Carson, California following a big dustup at a Nevada state Democractic convention over the weekend. You can hear some of that below.

Democrats are making comparisons between Sanders and Ralph Nader in the 2000 election, with some on the left saying he's threatening to hand this election to Republicans by splintering progressives and Democrats. Bernie supporters, meanwhile, are all for the dustup, and would love to see Hillary simply disappear.