I don't know if it's a general rule for everyone, but I got called racist for opposing Obama's socialist tendencies in 2008 before he even became president, and was still campaigning. I got it regularly, and I don't care about the colour of his skin (any more than I care about the orange-tinge of Trump's skin).
I saw it so often that I can't believe anyone couldn't see it. In fact, if anything, it's that sort of knee-jerk name-calling of anyone who didn't fully embrace the Obama/Clinton progressive line that most likely cost HRC the election. Sure, people on the coasts didn't mind because they were intelligent enough and progressive enough to vote for Obama purely on the colour of his skin, or Clinton on the gender she identifies as, and were sorry for all their unearned privilege. But the people in the flyover states, even ones that traditionally have been Democrat strongholds, have apparently tired of this "hyperbole and untrue" experience. Except it's neither hyperbole nor untrue.
Personally, I'd rather Trump wasn't president. I suspect many, if not most, people who voted for Trump also would rather he wasn't president. However, when his opponent drops into name calling ("deplorables" likely did as much as anything to sink Clinton's campaign), most didn't see much choice.
I'm just hoping he's a one-term president at this point. But if the Democrats continue to blame everyone but themselves for their loss, I'm not holding my breath.