He’s clearly lying to Congress.

It's an opinion, not a lie. You'd never get a perjury charge on that. It's not a factual question. For nearly ever border in every country for all time, there are always people and things that cross illegally. It's not like illegal imports of contraband (like drugs) is unique to the present day. And while there is undoubtedly a record number of people crossing the border these days, nearly all that increase are folks who are crossing and getting processed by the Border Patrol. The GOP is deeply unhappy about what happens to those people after they are apprehended by Border Patrol, but that doesn't make it factually false (rather than a difference of opinion) whether those levels of apprehensions mean the border is secure or not. It doesn't mean that an Administration official has to agree with their characterization of whether the department is doing a good or bad job running their portfolio.

Sure about that? Even the biggest RINOs in the party don’t like the guy.

So what? Most members of the opposition party won't like the cabinet officials of the current President, particularly those in positions where the Administration's policy clashes with the opposition party's. Few in the Democratic party were fans of Betsy De Vos, for example, but that's a far cry from casting a vote that she's committed a High Crime or Misdemeanor.

Only one cabinet official in history has ever been impeached - and that was 150 years ago, on claims that he was using public funds for personal expenses. No cabinet official has ever been impeached because the opposing party "didn't like the guy."