There’s a tragic irony to Joe Biden having launched his 2020 campaign by calling President Trump a racist, only to find himself getting buried this week after heralding his positive working relationship with racists and noting how good they were to him in the Senate.

You reap what you sow.

The former vice president on Tuesday fondly recalled working with the late Sen. James Eastland, a segregationist Democrat of Mississippi. “He never called me ‘boy,’" Biden said. “He always called me ‘son.’”

Martin Luther King Jr. couldn’t have said it better himself.

Nearly every other Democrat running for the nomination has piped up to denounce Biden’s comments.

In a previous incarnation of the Democratic Party, Biden would have nothing to be concerned about if he wanted to cite his productive rapport with racists in the Senate as a qualification for the presidency. He could have counted on party leadership to brush it aside and for the national media to dismiss the remarks as another example of Old Joe just bein’ Joe.

But that’s not how today’s Democrats operate, something that Biden seemed to understand before he even launched his campaign. At an event in January, he apologized for his shortcomings in being white. “The bottom line is we have a lot to root out, but most of all the systematic racism that most of us whites don't like to acknowledge even exists,” he said.

When he did officially join the race, he centered his video announcement on the old lie about Trump and Charlottesville.

“He said there were, quote, ‘Some very fine people on both sides,’” Biden said in his video. “Very fine people on both sides? With those words the president of the United States assigned a moral equivalence between those spreading hate and those with the courage to stand against it, and in that moment I knew the threat to this nation was unlike any other I’d seen in my lifetime.”

Biden knows that the social justice movement, along with its obsession with race grievance, can be used to knife your political opponents. But he didn't know the blade cuts both ways.

He’s getting exactly what he deserves.