A left-wing writer is making no apologies after suggesting on Twitter that the Wednesday morning shooting of a Republican congressman and staffers may have been tantamount to an act of “self-defense.”

Malcolm Harris, who has a book contract with Little, Brown of New York, made tasteless tweets Wednesday morning following the shooting of at least four people in Alexandria, Virginia, including Rep. Steve Scalise (R-La.).

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Harris suggested the shooting of conservative Republicans could be justified.

“If the shooter has a serious health condition then is taking potshots at the GOP house leadership considered self defense?” Harris tweeted.

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Harris followed that tweet up with, “Nope nope nope you can’t use ‘respect for human life’ to defend GOP house leadership. That’s just bad math.”

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Harris’ biography suggested at one point he writes for the liberal news site Vox. He doesn’t.

But he does have a book contract with Little, Brown of New York. The book is titled, “Kids These Days: Human Capital and the Making of Millennial.” Little, Brown did not immediately return a message from LifeZette.

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His author biography on Amazon lists him as a “freelance writer and an editor at The New Inquiry.” His book is scheduled to hit shelves in November.

His work has also appeared in the Village Voice and The New York Times Magazine. Harris has contributed to The Washington Post and the New Republic as well. He lives in Philadelphia.

But even Harris has some sense of shame. His most incendiary tweet was deleted.

About Scalise, a Louisiana Republican, Harris tweeted, “Hearing ‘David Duke without the baggage’ Steve Scalise is stable, but a lot of Americans dies from hospital errors so keep crossing your fing [sic].”

Dan Gainor, vice president of Business and Culture at the Media Research Center, told LifeZette that Twitter often brings out the worst in people.

“I think people need to be more responsible for the things they say,” said Gainor. “Twitter encourages people to walk right up to the edge of the cliff.”

Harris did not immediately return an emailed message from LifeZette.

In a Friday op-ed for The Post, Harris lauded the alleged leaking committed by NSA contractor Reality Winner, 25, of Georgia.

Winner was arrested for leaking secrets of her employer, the National Security Agency.

“We hardly invented leaking, but millennials are especially well-suited to the tactic,” Harris wrote. “It’s a squirt gun we can use on our leaders when they’ve stepped out of line. I don’t imagine that employers — public or private — are going to start inspiring loyalty or stop abusing power anytime soon, so expect the leaks to keep flowing. At least until millennials find a bigger weapon.”