"The unraveling of Rudy Giuliani."

Or, as another writer sought to explain, "How Rudy Giuliani went from a respected federal prosecutor and beloved NYC mayor to Trump's bag man."

Whenever they say it isn't about the money ...

The unravelling of Rudy Giuliani, by Lexington (The Economist)

No one member of Donald Trump’s coterie has fallen further than “America’s mayor”

Had Lexington’s 2007 incarnation been informed that the next Republican president would be a pro-gay, pro-choice, thrice-wed New Yorker, the name of Donald Trump would not have leaped to his august mind. Rudy Giuliani led the Republican primary by a big margin throughout that year. There were, to be sure, doubts about whether the former New York mayor was too socially liberal for small-town conservatives. He had once shared a house with two gay people and a Shih Tzu and, what was worse, acted in a comic skit alongside Mr Trump, that symbol of louche metropolitanism. Moreover America was not given to electing “abrasive” New Yorkers, Lexington cautioned then. But, like many others, he suspected Mr Giuliani’s dynamism and the broad support he enjoyed for his calm leadership after 9/11 and record of crime-fighting could compensate for such handicaps.

It has been pretty much downhill ever since for Mr Giuliani—culminating this week in what appears to be the worst crisis of his increasingly scandal-plagued career ...

(snip)

In truth it is hard to find any altogether convincing explanation for Mr Giuliani’s behaviour. He was once a serious politician prone to indiscipline; now he is wild. Yet a former colleague of his, who knows both men, suggests resentful envy of his old co-star Mr Trump—whom he must secretly disdain—may be eating him alive. If so, Mr Giuliani is going to really hate it when the president and his entire party flatly disown him. That looks like the inevitable next stage in his disgrace.