The racial gap on global warming

Every time the question has been asked, a lower percentage of whites have said it should be a top priority than non-whites. In fact, the gap between whites and non-whites has widened. The share of non-whites viewing climate change as a top priority hasn’t changed much; that same share of whites, meanwhile, has dropped more than 10 percentage points.

Is this just a partisan thing (i.e. Democrats are more in favor of the government developing a plan to combat global warming, and more minorities are Democrats)? This makes sense, but the racial gap exists even when controlling for political party.