If the proven track record of Democrats being more fiscally responsible than Republicans isn’t good enough for you, what response could anyone give that would be?
This, and the reason is obvious when you look at how the US budget process works.
Most of the US budget is mandatory spending, things like Medicare and Social Security where the legal authority and requirement to spend this money has been in place for decades. Unless Congress changes existing laws, neither the President of Congress have any control over how much this costs. The Actuaries working for the President add up the numbers reports them to congress and that’s that.
This makes up $3.1 Trillion of the $4.4 Trillion the US Government has budgeted for 2019.
The remaining $1.3 Trillion is discretionary spending, but there are two types.
Military spending, which uses multi-year appropriations so most of it doesn’t need to be re-approved by Congress every year. This is budgeted for ~$700 Billion in 2019
Non-military, which is basically everything else. This is what Congress debates and approves each year but it only makes up $600 Billion of the $4.4 Trillion US budget. While it’s not military spending it does include significant amounts of defence related spending primarily the VA and Dept of Homeland Security but about half the budget for the Dept of Energy is defence related as well.
So:
1) Mandatory Spending = $3100 Billion
Neither party changes this much and voters strongly support it and don’t want cuts.
2) Military and Defence related spending = ~$900 Billion
Democrats generally prefer to hold the line, Republicans usually want increases > the rate of inflation sometimes significantly. Voters generally don’t like cuts but are usually mixed on expansion.
3) Non-defence discretionary spending = ~$400 Billion
Democrats usually request modest increases Republicans generally request cuts. Voters either approve of most of it and/or approve of the money they personally benefit from. Voters also like promises that cuts will be made without cutting the stuff they like, but since someone likes almost all of it so actual cuts are seldom popular.
What typically happens in the yearly budget
Republicans want 5%-10% increases to #2 and usually get it ($50-$100 Bn per year increase)
Democrats want 5% increases to #3 Republicans want 5% cuts. After everyone gets their own stuff It goes up 2% - 5% per year. ($10-$20 Bn per year increase)
Overall most of the yearly spending increases can be attributed to Republicans preferences mainly because they support increase to defence related spending that makes up 2/3 of all discretionary spending. But the overall increase isn’t really that large
Where the deficits actually come from isn’t spending but in fact is almost all Republican sponsored tax cuts but ~$350 Billion of every years deficit comes from the unfunded Republican expansion of Medicaid back in 2004. The current deficit is ~3X the value of all non-Defence discretionary spending combined, so clearly spending cuts to this are will not even scratch it. It's reached a point where even deep cuts to defense related spending can't fix the issue either and voters don't want this things anyway. A fairly significant tax increased is the only realistic approach.