Sky News host Chris Kenny says the way Democratic hopefuls Bernie Sanders and Joe Biden proposed they would be picking a woman as vice president is “demeaning towards whoever they eventually announce" for the position.

Democratic presidential candidate Joe Biden confirmed if he won his party's nomination, then he would pick a woman to be his running mate.

Former Vice President Biden made the announcement during a debate with competitor Bernie Sanders on Monday.

“Talking about how their choice will be a woman, or even ordering up a progressive woman, it just sounds like cookie-cutter stuff, driven by identity politics and it's demeaning towards whoever they eventually announce,” Mr Kenny said.

“I don't know about you but I find the way they talk about this pretty irksome”.