Democratic presidential candidate Bernie Sanders wants Arizona voters to remember the environment ahead of next Tuesday's Presidential Preference Election.
In a 30-second spot, which started airing in Arizona on Tuesday, Sanders claims that he always opposed the Keystone XL pipeline.
"That's why Sanders said no to the Keystone pipeline and never waffled," the ad states.
We ran his claim through a PolitiFact truth check.
According to VoteSmart.org, Sanders voted against the Keystone XL pipeline four times since March 2012.
The pipeline would have carried crude oil from Western Canada to Nebraska, eventually ending up at refineries on the Gulf Coast.
President Barack Obama formally rejected the Keystone proposal in November 2015.
Sanders' claim is correct, so we rated it True.
The ad also addresses Sanders' climate change plan. Among the particulars - taxing carbon. The Vermont Senator also wants to create 10 million clean energy jobs, which would involve a "nuclear free" clean-energy system.
Sanders was in Phoenix Tuesday for a rally at the Phoenix Convention Center. His wife, Jane, visited Maricopa County Sheriff Joe Arpaio's "tent cities" on Monday.