Well, when they claim that X million illegal immigrants entered the country despite them supposedly not being in the system and thus not countable, and the numbers line up with asylum seeker numbers, and they do things like cancel asylum seekers status[1] or releases criminals to go after asylum seekers[2] its hard not to come to that inference.

[1]https://www.cbsnews.com/news/trump-ice-asylum-cases-deportat...

[2]https://www.cato.org/blog/trump-released-criminals-so-he-cou...