They have nothing to investigate. The President hasnt done anything wrong. Why on earth do you expect Congress to investigate when there is nothing to investigate?
Investigation for investigations sake would be doing nothing.
As for the budget, who cares? one budget out of 12. 6 years of which have been the first balanced budgets in decades.
Apparently, you dont understand how Congress works if you think you can just push through things when youve got minimal control of the Senate. And a bunch of traitors who let the opposing party illegally filibuster important things.