Tell me about it. The incumbent senator in my state is a Democrat and a highly regarded former governor who is generally progressive. His opponent, a douchebag corporate sellout who was the head lobbyist for Enron back when that shit hit the fan, has basically done nothing but repeat "He voted with Obama! He voted for Obamacare! Therefore, he's evil and hates you!" over and over again.
Note that while he did vote for the ACA, he also thinks its flawed in some areas and wants to change it. But since that's not the same as getting rid of it entirely, he's obviously an Obama-Bot Liberal Who Hates America (tm).
And yet Republican campaign signs are all over the place, and while the local newspaper is generally supportive of the incumbent most of the letters to it on the issue are, again, attacks against him for supporting Obamacare (which allegedly denies people health coverage).