LATHROP — A transportation labor dispute that’s not even supported by the rank-and-file members of the unions that started the fight could end up drastically impacting public transit operations in San Joaquin County. And that means that the very people that benefit the most from widespread access to the San Joaquin Regional Transit District and city-to-city connectivity — the handicapped, the elderly and the impoverished as well as residents that just don’t have drivers licenses or cars — will be forced to either make other arrangements or adapt to coming changes. According to SJRTD Planning Manager Nathaniel Atherstone’s presentation to the Lathrop City Council Monday night, the unions that represent the transit district’s employees — the Amalgamated Transit Union, the International Brotherhood of Teamsters and the Service Employees International Union — have elected to protest federal transit funding scheduled to flow to California.That means that just under $6 million worth of funding — or 20 percent of the SJRTD’s operating budget - is now on hold.