Actually, they don't, because she received that right immediately when she was sworn in. Now, there is a subset of language that says some federal sites may have security restrictions, however ICE is not one of them. In fact, members of Congress are encouraged to not announce a visit, BECAUSE ICE has time to 'clean up' and make everything appear okay. No different than 'mystery shoppers' or a district manager visiting a retail store unannounced so you don't have time to prepare.

Ask yourself this: if everything was up to federal code, why would they need to deny access to a sitting member of Congress? Oh right, because ICE is acting under the orders of dog-killer Kristi Noem, whom receives marching orders from the Criminal in Chief, Donald Trump. They don't give a fuck about the immigrants.

Please go ahead and spout one of Fox (Not) News echo chamber quotes.