Civis Analytics modeled two-way (that is, they excluded “don’t knows”) support in states and found that vulnerable Republican senators have reason to fear Mr. McConnell’s antics: In Colorado, Cory Gardner’s state, 60 percent of likely voters supported the Green New Deal, and in North Carolina, Thom Tillis’s state, 56 percent did. In Maine, where Susan Collins is likely to face a tough re-election battle, 57 percent of likely voters supported the Green New Deal and in Iowa, a wind-heavy state where Democrats hope to pick up a Senate seat, 54 percent did.