A big part of the pushback over President Trump's controversial travel ban is the idea that it's a solution in search of a problem — that terrorism caused by refugees and immigrants is oversold, and especially from the seven majority-Muslim countries that were singled out.

Kellyanne Conway on Thursday did nothing to rebut that line of argument, citing a nonexistent “Bowling Green massacre” as an example of the kind of attacks Trump's executive order would root out.

Here's the exchange with MSNBC's Chris Matthews:

CONWAY: It's the seven countries that were previously identified by President Obama as being high risk as being states that either harbor, train or export — and/or export terrorism. These are nations very narrowly proscribed and also temporary.
CONWAY: I bet there was very little coverage — I bet — I bet it's brand-new information to people that President Obama had a six-month ban on the Iraqi refugee program after two Iraqis came here to this country were radicalized and they were the masterminds behind the Bowling Green massacre.
CONWAY: (INAUDIBLE) don't know that because it didn't get covered.

Well, it didn't get covered because it didn't happen; there was no Bowling Green massacre. As The Post's Samantha Schmidt writes, there were Iraqi citizens, living in Bowling Green, Ky., who were attempting to send weapons to al-Qaeda in Iraq, in 2011, but it never came to fruition. They were arrested, and their arrests were covered plenty.

Perhaps it could be excused as a slip of the tongue. But in context, it's just more evidence of a White House messaging operation that doesn't have its shoes on the right feet. Time and again in the last two weeks, Trump's top messengers have gotten their facts wrong, mixed their messages and struggled to defend their boss. There simply doesn't seem to be any plan.

A sampling:

Video: The White House’s vague statements about Frederick Douglass (The Washington Post)

There have been plenty of theories out there about why Trump spouts untrue information. Perhaps it's just an effort to muddy the waters, some say. Perhaps it's part of some Machiavellian effort to distract from the “real issues.”

Or perhaps it's just that that the White House doesn't really have any plan in place — that their talking points about a major and controversial travel ban still haven't been nailed down a week later.

Sometimes the simplest explanation is the most likely one.