Takeaways from Tuesday primaries: Trump endorsement only goes so far

Several high-profile primary races Tuesday tested how much President Donald Trump's endorsement can do for a scandal-marred candidate, showed the impact of Republicans' mid-decade redistricting and highlighted the continued battle between established Democratic candidates and progressive challengers.

Here are takeaways from Tuesday's primaries:

### Trump endorsement can't lift Mills

Embattled and scandal-ridden Republican Rep. Cory Mills lost his reelection bid in Florida Tuesday, defeated by challenger Ryan Elijah, a former TV news anchor and NFL sideline reporter.

Mills faces a House Ethics Committee investigation; a judge issued a restraining order against him last year after he was accused by his former girlfriend of threatening to distribute sexually explicit videos of her; and in July, ABC News reported that the embattled congressman was also under investigation by the Department of Justice, in part about his finances. Mills has denied the allegations.

Mills' loss suggests that Republicans have limits when it comes to how long they can stand behind a candidate carrying too much baggage. Despite the scandals that have followed him, Mills still retained Trump's endorsement.

### Putting aside differences before November

Republican Rep. Byron Donalds unsurprisingly secured his party's nomination in the gubernatorial race in Florida. Donalds' campaign has received immense support among Republicans and Trump's endorsement.

Donalds now faces the task of uniting his party after what was a bruising primary. Donalds said he received congratulatory calls from his competitors, Paul Renner and James Fishback. In his victory speech, Donalds called for Florida Republicans to come together.

"But tonight the primary is over. Tonight we put aside our differences. Tonight we are one united Republican Party," Donalds said.