Why each race matters:
- Ohio's 12th district is solidly Republican and overwhelmingly white. But the incredibly close finish shows they should be worried about November 6.
- Kansas' GOP governor's race was Trump vs. the Republican establishment — and was incredibly close. If Kris Kobach wins, it’s further proof of Trump's unparalleled power in the 2018 primaries.
- Michigan's Democratic governor's race was a perfect example of the progressive left’s fight to shake up the Democratic Party.
- Missouri's GOP primary for U.S. Senate went to Attorney General Josh Hawley. Republicans went all-in to help him win and Sen. Claire McCaskill has been considered a vulnerable Democrat since 2012.
Go deeper with the live results from every election tonight.