25 June 2014
Last updated at 05:38
Thad Cochran reached out to traditionally Democratic voters who were eligible to participate in the run-off
US Republican Senator Thad Cochran, who is seeking re-election, has narrowly beaten a Tea Party candidate in a high-profile primary in Mississippi.
Mr Cochran, a six-term senator, had the backing of establishment Republicans but was forced into a run-off by Tea Party challenger Chris McDaniel.
The race was seen as a crucial test of the direction of the Republican Party ahead of midterm elections in November.
Moderate Republican candidates also won primary races in Oklahoma and Colorado.
The BBC’s Beth McLeod in Washington says Thad Cochran’s victory, although narrow, will come as a relief for moderates who were faced with a challenge from hardline conservative groups within the party.
Earlier this month, establishment Republicans suffered the shock defeat of former House Majority Leader Eric Cantor by a little-known Tea Party challenger in his Virginia district.
In a brief speech, Senator Cochran thanked those who supported him.
“It’s a group effort, it’s not a solo, and so we all have a right to be proud of our state tonight,” he said.
The 76-year old is expected to retain his seat in November’s congressional elections.