Its is important to recognize that more or less continuous deficits are the normal condition for a large country with a fiat currency which is also the reserve currency. Deficits can be too large, too small, or just right. Human fallibility, an unknown future, and political pressure create error that makes it difficult, but not impossible, to get them just right. The current tax plan seems to be headed to too large, but deficits per se are not necessarily bad! Unfortunately there is much more to a macro economy then getting the deficit right. We are learning that how money is distributed in a economy makes big differences.
We should not lose sight of reality. Federal finances are VERY different from personal finances. We have a built-in two percent inflation target... The U.S. can not go bankrupt, though it's currency can rapidly depreciate under mismanagement. Congress is the Horse, the Fed and Treasury are the Cart. There are ET folks who perennially get this relationship backwards.
Politicians have an incentive to create nominal growth because through the "wealth effect" this helps them keep their jobs. Nominal growth can however be far different from real growth, the latter being constrained by factors outside the politicians' control. Nominal growth can go on forever so long as exponential math is available, real growth is constrained to a limit.