(CNN) Sen. Bernie Sanders of Vermont is once again saying on the campaign trail and in interviews that the US spends twice as much on health care, per capita, as any other country in the world.

It's a claim he has been making since at least 2009, when PolitiFact noted that it was false. He made it again in 2015, when PolitiFact noted that it was still false.

Facts First: It's still false now. The US does spend the highest amount on health care per capita of any Organisation for Economic Co-Operation and Development country, but not double every single one.

The claim has been a staple of Sanders' rhetoric during his campaign for the Democratic presidential nomination.

He tweeted in April that, despite the failings of the US system, "we still spend twice as much per capita on health care than any other country." He said in a CBS interview last week, "We are now spending twice as much per capita on health care as do the people of any other country." He said on CNN in June, "Right now, we spend twice as much per capita on health care as do the people of any other nation."

Read More