Rudy Giuliani, a former New York City mayor who represented Donald Trump in court, said Sunday that his “financial difficulties” had worsened after losing his radio show. On a Sunday YouTube livestream, Giuliani said that WABC had ended his radio show after breaking station rules forbidding him to talk about the 2020 election and Dominion Voting Systems, which is suing the former mayor. “I was never warned not to talk about the 2020 election,” he complained. “Even about Dominion, I think once they came to me and reminded me, I mentioned Dominion. Most of the time, I picked it up, and I apologi…