Curtin University Professor Joe Siracusa says Joe Biden is a "lame duck" president - with half the people in his party ready to "pounce" on him.
Processor Siracusa assessed Biden's time as president so far - stating he "hasn't done a very good job yet".
"He's a lame duck president," Professor Siracusa told Sky News Australia.
"And no one has to pay much attention to a lame duck because they ain't going to be around long enough to hurt you.
"I think half the people in his party are ready to pounce on him."
