First of all, the tax cuts were not "massive"; second, the tax cuts DID cause some of the deficit spending over his four years; third, and BUT, a lot of that deficit spending in the last two years of his administration was related to Covid and the shut down of the US economy (when (many) people panicked that we were all going to die, if we had any contact with other human beings) and the federal government was concerned that we were heading towards a 1930's-type of depression, if we didn't have a huge federal response. You can make an argument that the Trump administration and Steven M (the Treasury secretary) saved the economy and the country with their quick and massive fiscal response to the pandemic but it did cause the national debt to spike.