Weird that you haven't mentioned broken Republican promises like paying down the debt, sending out DOGE checks, or repealing the ACA. Also weird that you haven't mentioned the proposed $1.4T defense budget, which (ceteris paribus) will add about $800B of deficit spending a year. I'm sure it's just a coincedence?
Well, paying down the debt would require repealing the ACA... and that requires bipartisan support that the GOP does not have. So it's all hot air. It's the GOP version of 'taxing the rich.' Sounds good on camera to give cranky old men an adrenaline rush, but isn't a serious policy because it doesn't survive first contact with the enemy.
As for the defense budget... building and maintaining a joint force that can outpace China costs money. Our defense budget, in percentage of GDP, fell to a low of 3-3.2% before Trump's $1.4 trillion budget proposal. We were (and are) violating our NATO treaty while pointing fingers at Europe to spend more on defense. If we were to follow NATO guidelines, the budget would be a minimum of $1.6T.
I do take issue with your accusation that strictly defense spending will add $800B to deficit spending. You could dial the defense budget to $0 and we would still have a $400B deficit.
The $800B additional deficit exists because the entire federal budget is greater than the income it receives. Part of that is the big beautiful bill (which has a lot of wtf are you doing provisions, IMO) and Trump's delusions that tariffs would pay the difference, part of that is defense spending, and part of that is uncontrollably rising health-insurance sharing costs.
If you were a Senator and I put forth a bill where we repealed ACA tax credits but kept the regulatory standards, eliminated the pass-through deduction, reinstate the progressive corporate tax schedule, eliminated clean energy credits, and changed the marginal income tax brackets as follows: the 22% bracket becomes 18%, the 32, 35, and 37% brackets become 35, 37, and 40, would you vote for it? Now what if you're Chuck Schumer and you're representing millions of New Yorkers who would see their taxes go up by a really large amount?