U.S. and Iran miss peace talks deadline. And, Alaska, Florida and Wyoming primaries

Florida, Wyoming and Alaska hold primaries; mixed messaging from White House on Iran talks.

The U.S. and Iran missed a deadline to begin peace talks this week. The monthslong war has depleted U.S. resources. And, what to know about Alaska's U.S. Senate seat primary.

The vote could provide clues about which party will emerge with control of the House of Representatives and the Senate in November's midterm elections

NBC News chief data analyst Steve Kornacki breaks down real-time vote tallies from primary elections in Alaska, Florida and Wyoming and a special election to replace California's Rep. Eric Swalwell, while giving viewers a behind-the-scenes look at election night coverage.