Wait what? The administration decides the spending that Congress can approve or reject. Trump was absolutely pushing for the tax cuts when Repubicans had control of the House. Why is no Republican harping about the deficit now? I can understand if the deficit was due to infrastructure spending but giving Zuckerberg a tax cut is not going to help the economy.
1. Many people do not care about the deficit to a great degree on either side of the political aisle. This despite a lot of rhetoric by one party or another.
2. The party in power seems to always find a way to blame their predecessor for their ills. I've personally seen Trump supporters blame immigration for the current rising deficits.
no, budgeting is Congress's job. Traditionally the President sends a proposal, but it's certainly not required. In fact, I believe that Trump has been somewhat derelict in this.