"If Reagan’s dominant emotional note was optimism, Trump’s is fear.... It’s not a cowering, timid fear; it’s more a dark, resentful porcupine fear." NY Times.
Having encountered porcupines in the woods now and then over the years, I'd have to say they never strike me as being particularly fearful (why would they be?), let alone dark or resentful. More charming and bumbling. Un-Trumpian.