Former Republican joins Democrat Harris to campaign against Trump in Wisconsin

Former Republican congresswoman Liz Cheney and Democratic presidential candidate Kamala Harris said former President Donald Trump is not fit to lead the US, urging voters to put country over party as they campaigned together on Thursday.

Cheney and her father Dick Cheney, who was vice president under George W. Bush and is still vilified by Democrats for his bullish defence of the Iraq War, are staunch conservatives and two of the most prominent Republicans to have endorsed Harris against Trump in the November 5 election.

Both have sharply criticised Trump, the Republican nominee, calling his refusal to accept his 2020 election loss and his role in the January 6, 2021 attack on the US Capitol disqualifying.