He’ll definitely have a harder time getting re-elected — that’s for sure. Because he’s either going to have to make up these funds by appealing to the state (and this is South Carolina we’re talking about) or finding more tax revenue from within his city (which won’t win him points). But without the funds, needed services will go unfunded, which will result in greater homelessness (no more ribbon cuttings for new affordable housing), less affordable childcare, which will affect the ability of working adults to keep their jobs, and if desperation becomes great enough, an increase in crime. The quality of life for the whole city will go down — even for those who are not direct beneficiaries of CDBG funding.
The citizens of Columbia will, of course, blame their mayor. Unfortunately for them, any mayor will have the same problem.