Two things to keep in mind before you complain about the GOP failing to support Trump and failing to help push his agenda:
1. From what I've read, every GOP House and Senate member who won in 2016 carried his/her district or state by a larger margin than Trump did. Keep this in mind when you wonder why these people aren't enthusiastic Trump supporters. Their constituents like them more than they like Trump.
2. Trump held a rally in Grand Rapids, Michigan a couple of months ago. According to the accounts I've read, somewhere between 30% and 35% of the attendees were registered Democrats. These are voters who will vote for Trump but are not likely to vote for GOP House and Senate candidates.
What Trump is doing here is trying to steer a political conversation within a two-party system when our political landscape is actually dominated by three political movements:
A. Globalism (the dominant movement in Washington ... Hillary Clinton was the Globalist candidate in 2016)
B. Marxism (a subset of the Democratic Party ... Bernie Sanders was the Marxist candidate in 2016)
C. Nationalism (a loosely-affiliated group of mostly Republicans but also many Democrats and conservative Independents ... Donald Trump was the Nationalist candidate in 2016)
Here are your three "political parties," folks. Now tell me how Party C wins control of anything beyond the White House.
my complaints about th got started before trump. I see no reason to support the party. Trump will be gone someday and we will be stuck in the middle.
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Permanently? Are you parsing now? Why did you BOLD your original comment as if to be emphatic, and why didn't you put 'hijack' in quotes then, but not now? Here is your original comment exactly as it appeared:
No. He played the nomination process perfectly and basically hijacked the GOP.
The way you state it, it looks as if your excellent question answers itself: Build a "third" party within the GOP. Have Trump-supporting, nationalist candidates start way in advance of the GOP primaries, running where the incumbent is a Democrat or a weak GOP anti-Trumpster. If the Trumpster wins his primary--drawing on marketing campaigns to Trump supporters cultivated from all parties, growing the number of registered Republicans--work the blue-collar, patriotic angle to peel away union, black, and Hispanic Democrats in the general election. All the campaigns need to be predicated on going after the full spectrum of Trump demographics.
A parallel of that is how the GOP became the pro-life party: It peeled away Democrats who had become disgusted with the aborters, and in the process, turned those same people, some of whom had been liberal, against socialist policies. The pro-life movement is what saved the GOP from being a minority party, which it had become before Reagan, and probably caused a lot of Republicans to change their views on abortion and possibly avoid hell. Win-win-win, eh?