United States President DONALD TRUMP has replaced his campaign manager months before election.

President TRUMP said he had substituted BILL STEPIEN, a field director for his 2016 campaign, in place of BRAD PARSCALE.

PARSCALE who was reportedly blamed by president TRUMP'S inner circle for a poorly attended rally in Oklahoma last month will stay on as senior adviser.

President TRUMP'S statement on his official Facebook said: "BRAD PARSCALE, will remain in his role as digital and data strategist, while being a Senior Advisor to the campaign."

PARSCALE, who served as a warm-up act for president TRUMP at rallies, was appointed campaign manager in February 2018.