Darline Graham’s primary challenge and Trump shifts to ‘low-keying’ it with Iran: Morning Rundown

Darline Graham faces an uphill battle in the race for her late brother Lindsey’s Senate seat.

Darline Graham faces an uphill battle in the race for her late brother Lindsey’s Senate seat. Trump signals a shift to economic pressure as the Iran war keeps drifting. And nearly 100 fires across the U.S. strain firefighting resources.

Here’s what to know today.

Ralph Norman; Darline Graham.USA Today Network; Getty ImagesDespite President Donald Trump’s endorsement of Darline Graham, tomorrow’s Republican primary to replace her late brother Lindsey on the November ballot is likely headed to a runoff.

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Multiple sources told NBC News they predict the runoff will be between Graham and Rep. Ralph Norman, who ran unsuccessfully for governor this year. The matchup could be an uphill climb for Graham, who has never held elected office before now and had a short window to introduce herself to voters.