US Vice President Kamala Harris has received some of the “best news” as polling turns her way in the state of Iowa, Sky News host Paul Murray says.

“The best news for Kamala Harris is, just like Donald Trump she is crisscrossing the country … whether that is going to work this time when it didn’t in 2016, we’ll all find out together,” Mr Murray said.

“A poll from a state we did not consider to be a swingstate or one that is going to be changing, it is the state of Iowa.”