Rudolph W. Giuliani is running out of money and looking to collect from a longtime client who has yet to pay: former President Donald J. Trump.
To recover the millions of dollars he believes he is owed for his efforts to keep Mr. Trump in power, Mr. Giuliani first deferred to his lawyer, who pressed anyone in Mr. Trump’s circle who would listen.
When that fizzled out, Mr. Giuliani and his lawyer made personal appeals to the former president…