Dick Cheney, a former US Vice-President and a lifelong Republican, has said that he would vote for the Democrats' Presidential Candidate Kamala Harris in November's election as he confirmed opposition to his party nominee Donald Trump.
Cheney, an influential figure during the presidency of George W Bush, announced his support in a statement.
He said there had "never been an individual who is a greater threat to our republic than Donald Trump", former President and the current Republican candidate for the US presidential race.
Cheney’s daughter, a former Republican lawmaker Liz Cheney, had told an audience in Texas earlier that her father planned to back the Democratic nominee.
“He [Trump] tried to steal the last election using lies and violence to keep himself in power after the voters had rejected him," said Cheney.
"He can never be trusted with power again," added the former vice president.
“As citizens, we each have a duty to put country above partisanship to defend our constitution," he said adding that he would cast vote for Vice-President Kamala Harris to defend the national constitution.