The Republicans have this idea that cutting taxes and increasing spending will reduce the ratio of debt/gdp by increasing the denominator. It does increase GDP but I think it increases the debt faster, so it can't work. Happy to be proven wrong.
They do not actually believe that. What they believe is that cutting taxes will give them the short-term means to acquire assets that will become much more valuable after the nation has been destroyed, to which the escalating debt contributes. The crisis is a feature for them.