Donald Trump expected to pardon former strategist Steve Bannon

US President Donald Trump is rumoured to be considering a pardon for Steve Bannon (Gerald Herbert/AP)

US President Donald Trump is expected to pardon his former chief strategist Steve Bannon as part of a flurry of last-minute clemency action, a source said.

The person, who spoke on condition of anonymity, stressed that Mr Trump has flip-flopped repeatedly as he mulls his final clemency action, and warned the decision could be reversed until it is formally unveiled.