Republican officials and strategists are privately burying their heads in their hands over former President Donald Trump’s undisciplined behavior and chaotic approach to attacking Vice President Kamala Harris, Politico reported Monday. This comes as Trump, whose aides had spent months carefully crafting a strategy to attack President Joe Biden over his age and fitness, searches for new lines of attack against the vice president — and as he continues to pick fights over random grievances that enter his mind, including attacks on the family of Gov. Brian Kemp (R-GA), whose support could be signi…