If Sanders wins the nomination, some Democrats worry that Trump and the Republicans will hammer him on long-buried words in defense of repressive governments in Nicaragua, Cuba and the Soviet Union.

Other critics argue that Sanders’ record raises questions about his foreign policy judgment, and whether, after decades of denouncing America’s use of force, he would continue the aggressive counterterrorism policies embraced by both parties since the 9/11 attacks. His aides have already suggested to NBC News that the number of targeted killings of terror suspects would fall if he were president…

“Bernie Sanders is not a Democrat,” said Steve Schmidt, a Republican political consultant who ran Sen. John McCain’s 2008 presidential campaign and opposes Trump. “He is a socialist, and he supported communist revolutionaries all over the Western hemisphere in the 1980s at the height of the Cold War. These positions are antithetical to the values of the country, and certainly explains why the Trump campaign is so enthusiastic about Bernie Sanders as an opponent.”