From the power of President Donald Trump’s endorsement to whether the progressive left can win in statewide battleground races, here’s what POLITICO is watching tonight.

1. Wisconsin governor — Democrats’ ideological war

If democratic socialist Francesca Hong triumphs against Milwaukee County executive David Crowley, it would be a major victory for the left.

But she’d still have to convince Democrats — and even some top progressives like Sen. Bernie Sanders (I-Vt.) and Rep. Alexandria Ocasio Cortez (D-N.Y.), who’ve stayed out of the race — that she is electable in a general election.

Many Democrats are already warning that Hong could drag down…

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