This kind of pedantry provide no insight: Trump doesn't represent the small government wing of the party that opposed infrastructure spending
You're saying that it existed before and that it opposed infrastructure spending doubtfully out of heartfelt principle. Now that the Republican Party candidate has been elected, does this wing still exist? If it exists then surely it can be depended on to resist any large government infrastructure spending that a populist candidate would propose.
Surely this is the case.
There were clearly vast distances between the Pre-Trump Republican establishment, and the Republican electorate, and so it would make sense for the post-Trump Republican establishment to move in Trump's direction. That process is currently nascent, and the differences have, if reports are anything to go on, yet to have shaken out.
Because of the way Trump operates, and because of the populist shift of the Republican electorate, I'd expect Trump to win most of the internal battles on spending. The winds are at his back. He will probably also flip many Republicans who previously positioned themselves as staunch fiscal hawks.
If Colin Powell and Condoleezza Rice do something, that's OK. If Hillary does the same thing, it's treasonous. Got it?