Probably true.
I assume if you are a "better people" in America now, it's not socially acceptable to say you are voting Trump.
It has been the same all over Europe with the right wing parties; media labels anyone considering voting them as a stupid, poor, uneducated, racist etc. And no middle class person says to your face he/she is going to vote this right wing party.
But as we now, these right wing parties have been on roll in Europe recently. So someone is voting for them... even though no one knows who they are.