Two decades after the end of the cold war, Mitt Romney still considers Russia to be America’s ‘No. 1 geopolitical foe.’ His comments display either a shocking lack of knowledge about international affairs or just craven politics. Either way, they are reckless and unworthy of a major presidential contender.

Regardless of whether Mr. Putin is out to help Mr. Trump, voters would be right to question the judgment of a candidate who has shown so much admiration for such a dangerous adversary.