“Border Patrol sources say ‘the dam is about to break,’ and Joe Biden and ‘border czar’ Kamala Harris are nowhere to be found,” reads a tweet from the GOP.

Harris’s office rejects the notion that she’s in charge of the administration’s border policy, with a top aide saying within days of the assignment that she “is not doing the border” and would instead deal strictly with the root causes of migration. Harris has visited Guatemala and Honduras as part of her focus on Northern Triangle countries, speaking about migration only sporadically.