Alabama business leader Katie Boyd Britt is headed to a runoff for a U.S. Senate seat against Rep. Mo Brooks, who survived an un-endorsement from ex-President Donald Trump.  Britt, the former head of the Business Council of Alabama, led the field, but did not win the 50% of the vote needed to claim the nomination outright; Brooks came in second to qualify for the runoff. The candidates are vying to replace retiring U.S. Sen. Richard Shelby, R-Ala. Britt once worked as Shelby's chief of staff.  The Republican nominee will be favored to win the fall election in GOP-leaning Alabama.  Click on the link on our bio for more on this race and other coverage from Tuesday's primaries from across the country. 📸: @vashaphotog, @apnews; USA TODAY graphic