Donald Trump was in full crass/disgraceful/boorish mode while standing among the faithful in Minneapolis, Minn.

He ventured to the Twin Cities ostensibly to target an audience he thinks might help him win re-election in November 2020. He lost Minnesota to Hillary Clinton in the 2016 election … but not by very much. Trump believes he can parlay that close finish to victory next time.

How would he accomplish such a feat? One way, I suppose, is for him to go directly after the individual he believes poses the most direct threat to his re-election. That would be former Vice President Joseph R. Biden Jr.

Trump crassness was on full display, particularly when he said Biden’s only claim to being an effective VP was that he learned how to “kiss (Barack) Obama’s a**.”

Ohhh, the crowd loved it! They screamed, they hollered, they cheered themselves hoarse. The Donald loved the reaction.

I am one who is utterly astounded that the president of the United States would say such a thing about any American citizen, let alone a former vice president of the United States and a man who likely has more friends on the Republican side of the aisle than Donald Trump.

Trump, though, behaves in a boorish fashion that I believe far exceeds the behavior we have ever witnessed in a head of state/commander in chief.

They reported that the arena in Minneapolis was full. I expect the American Airlines Center in Dallas, where Trump will stage another political rally next week, also will be full. I mean, he’s coming straight into the heart of Trump Country — even though Hillary actually collected more votes than Trump in Dallas County.

Still, Dallas is surrounded by Trump-friendly communities and the president will be able to display to a highly receptive audience how low he can go.

I’ll be in the crowd listening to this individual’s idiocy.

My fervent hope — at this moment — is that I don’t puke.