"While attitudes about Obamacare are pretty baked into the cake, McCain has been using the issue effectively for weeks," said Jennifer Duffy, an editor at The Cook Political Report. "I expect that it will be helpful to Republicans in states seeing the highest premium increases and fewer choices of plans. The issue is already or will soon be used in Indiana, Missouri, Wisconsin and North Carolina."
"Ayotte has untethered herself from Trump and has suffered a backlash from the Republican base for doing so, and been attacked by Democrats as unprincipled and opportunistic," said Jennifer Duffy, an editor at the Cook Political Report. "I wouldn't blame her if she is feeling that perhaps it wasn't worth doing."