He did receive some criticism at the time:
Within a couple of days, it was clear the mayor and governor couldn’t quell the unrest, even with National Guard troops and curfews in place. President George H.W. Bush felt he had to intervene. He sent in several thousand federal troops to restore order, a decision for which he was widely criticized. He also took heat for waiting five days to visit, especially from the Independent populist Ross Perot, who was the front-runner in the upcoming presidential election. By May 4, the violence had subsided enough that the curfew could be lifted.
https://millercenter.org/riots-city-angelsI don't think it made much difference to the election though. California was going Democratic anyway, and elsewhere people probably had other things on their mind by November.
