I'm gonna guess you just woke up from a coma and missed the last two years. Let me see if I can catch you up fairly quickly....
Donald Trump was elected President. The Republicans controlled the House and the Senate. Good deal, you would say, right? Well, it was a great deal if what you were looking for them to accomplish was giving tax breaks to those that needed them the least and getting a drunken fratboy onto the Supreme Court. If you were looking for them to do something about the problem of illegal immigration, it wasn't such a great deal, with the two things above taking up so much valuable time because the President couldn't even keep his own damned party in order.
So as a recap....they could have done basically anything they wanted to for two years, and they didn't do a damned thing about illegal immigration. Care to take a stab at the reason for that? Here's a hint....because they don't really care. None of they ever actually intended to get a wall built, because the majority of people don't want it built. That, however, doesn't stop them from using it as red meat for the base, who is needed for them to keep the power they have.
Talk about lapping it up...you guys bought the lie hook, line and sinker.