I wasn't able to retrieve the actual content of this article — the page returned an access-denied/JavaScript-required message instead of the story text, so no article content was provided to summarise. Based on the headline alone, it appears Republican congressman Sam Graves endorsed a candidate named Stigall, who has gone on to win the GOP primary for an open U.S. House seat in Missouri.

I can't provide details on the numbers, margin of victory, other candidates, or the district in question, as none of that information was included in the text supplied. If you can paste the article text directly or share an alternative source, I'd be glad to produce a full, accurate summary.