First, the Democrats DID try to do a lot of this, during Obama's time in office. The Republicans blocked it all, even when they thought it was a good idea, because they had only one agenda and one loyalty: make the economy as bad as possible, in order to make the Democrats, and Obama in particular, look bad.
Now. As to what Trump is proposing. Mitch McConnell, Senate majority leader, has declared that he flat out opposes much of what Trump wants.
There will be no term limits.
Infrastructure rebuilding is "not high on their agenda."
Trying to repeal the ACA might happen, because they are on the same page there.
The famous Wall, McConnell avoids talking about, which means he and the Senate Republicans wont support it.
In general, as you may recall from the campaign days, the Republican Party leadership doesn't like Trump. The only person they dislike more than Trump, was Clinton.
It's going to be interesting to see what happens.
And by the way, this is why I emphasized a while back in other threads, that it isn't so much who gets elected President that matters, it's who the people vote in to the House and Senate. And the same Americans who gave Trump the White House, gave the Senate to the Republicans who oppose Trump.
Here we are at the end of the first hundred days.
As I suspected, no consensus, and hence no action by the entirely Republican controlled house and senate on any of the major things listed originally.
I was wrong about them rolling away the ACA. I thought they had the fanatic hatred of it they claimed to have, but apparently they only said they did, to get elected.
No term limits, as I said. Not even brought up for discussion.
Not enough support for the wall to pass it without Democrats helping, and we have yet to have seen a budget proposal supported by the entire GOP that includes it. Still on Trump's agenda, though.
Still no infrastructure spending. Again, we still have to wait and see what the GOP will do with the budget that Trump is about to start pushing, as a part of Tax "reform." The Republicans will have to answer to all their supporters that they've promised for years now, to pay for all tax cuts with spending cuts, since Trump wants to simultaneously cut taxes TREMENDOUSLY, while increasing Defense Spending AND building the wall (which Mexico is still not going to pay for), AND investing in infrastructure renewal.
So: first 100 days? As I expected, Trump had to admit that "it isn't as easy as I thought," even with his Republican majority control. I was right about that much. Most Republicans are not Trump Republicans, at least not yet.