President Biden hires lawyer 'whose only job' is to keep him out of jail

US President Joe Biden has hired a "very expensive" lawyer whose "only job" is to keep him out of jail, says Curtin University political analyst Joe Siracusa.

It comes as President Biden's legal team is preparing to defend against the possibility of impeachment if Republicans gain a majority in Congress after midterm elections.

"All the analysts in America, pundits, are picking a landslide at the midterm elections in November," Professor Siracusa told Sky News Australia.

"President Biden knows they're coming for him.

"They're going after him, the kid (Hunter), they're going to go after his performance ... they're going to go after incompetence.

"Particularly, they're going to start with the departure from Kabul in Afghanistan and they're going to go to the southern border.

"Biden knows it’s coming – he hired a very expensive fellow; he's going to be called special counsel and his only job is to keep President Biden out of jail.

"He may be a little tired and sleepy sometimes, but he was smart enough to hire a first class lawyer to represent him."