Let me make sure I understand you.....The WH changes to a republican.......who also has a republican congress........and Trump HAD TO CONVINCE the speaker and the leader to pass tax cuts. ROTFL. Trump must have learned some serious mind control shit at Wharton. What great powers of persuasion.
I......I know you're a bright guy, so I must assume you think I'm not or you just can't make yourself say anything negative about Trump.
Congress can pass all the freakin legislation it wants. It means nothing without the president's signature. You know that.
The president lays out his legislative agenda, like in the State of the Union. He usually works with a member or members of Congress to sponsor a bill that includes what he wants. The sponsor(s) lobby other members of Congress for passage of the bill and the president works with his staff to also lobby Congress. That's how it usually works, the president being the driving force. Not these days. If it's going well he takes credit. If not, blame somebody else.
He couldn't get immigration reform when he HAD both houses of Congress. He refused to sign a bipartisan bill he said he WOULD sign. The pubs in the senate just gave up trying because he was changing his mind all the time.
The system works when our elected officials work together to pass legislation, understanding they have to work together and actually compromise and negotiate. Trump has zero interest. Since you didn't object earlier, I'll assume you agree that he wants it his way or there will be no immigration deal. He's counting on immigration to be the centerpiece of the 2020 election. He's making it happen.
The bill you're referring to, when the Rs controlled both chambers, did not end up going far enough. If you will recall, there a great deal of back and forth on what it would contain (or not). These things were considered:
1) Funding for wall
2) eVerify strengthening for employers
3) Elimination of Chain Migration
4) Ending the visa lottery
5) Limits on the number of legal immigrants in a calendar year
6) Increased resources for ICE and Customs and Border Control
7) Cracking down on visa overstays
8) Path to citizenship for Dreamers
9) Path to citizenship for illegal aliens
You make it sound like "bipartisan deal" had all of the elements of 1-7 especially. The final version did not, and in the end, was too weak for Trump to accept. Multiple variations were thrown around. You make it sound like Trump had the deal he wanted and couldn't take yes for an answer. This is not true.
The final version was kind of a hollow shell of a deal, and gave the Ds much of what they wanted and gave him too little of what he wanted. In the end, he rejected the deal and the establishment Rs never seriously tried to bring it back up again. The Ds dug in and asked for more concessions and wouldn't accept most of 1-7. Pelosi famously said "Not one penny for the wall" and any chance for a deal fell apart. There's even less chance right now because the Ds control the House.