The Biden Administration will likely be "focussed on national securities," meaning Australia may have to make harder choices in the defence space, according to the Lowy Institute’s Richard McGregor.

“Trump was focussed on trade,” Mr McGregor told Sky News. “The Biden Administration might be much more focussed on national securities.

“That might mean harder choices for us in the defence space.”

Mr McGregor said this may mean the US would expect Australia to look at things including “intermediate range missiles” and the possible placement of “more Marines in Darwin”

“They might like us to do greater naval exercises in the South China Sea,” he said. “I think they’re going to expect us to step up as a strong ally.”