AT Political candidate in Mississippi has refused to allow a female reporter to cover his life.

Robert Foster, 36, a Republican career politician, is running for the governorship of the southern US state.

Larrison Campbell, a female political journalist, was assigned by Mississippi Today, a local news website, to write about him.

She asked to accompany Mr. Foster on a 15-hour campaign trip, but was told by his staff that Mississippi Today would have a young colleague with her.

Ms Campbell said she was told that "the optics of the candidate with a woman, even a working reporter, could be used in a smear campaign to insinuate an extramarital affair."

The campaign simply "can not risk it," she said she was told.

The journalist added: "My editor and I agreed the request was sexist."

Mr Foster responded on Twitter: "I'm ready, the liberal left their minds over the fact I choose to be alone with another woman.

"They can not believe, that even in 2019, someone still values ​​their relationship with their wife and upholds their Christian Faith."

He wrote that he and his wife followed the "Billy Graham Rule," a practice attributed to the late evangelical preacher not to spend time alone with any woman other than his wife.