WASHINGTON - An endorsement from US President Donald Trump is worth a lot in Republican primaries. But is it worth more than $100 million in Georgia? Can it propel a sitting congressman past an insurgent outsider in Alabama? Can it transform a candidate into a front-runner in Oklahoma?
Trump has been at the center of this year's midterm campaigns, and his influence will be tested in different ways on Tuesday as four states and the District of Columbia hold primaries.
