He’s irking some of his richest friends, too, by snubbing their pleas to end the conflict in Ukraine and ostracizing all but a handful of hardliners. The ruble’s plunge has heightened opposition to Putin’s backing of the rebellion in Ukraine among his wealthiest allies, prompting the president to shrink his inner circle from dozens of confidants to a small group of security officials united by their support for the separatists, two longtime associates said. Putin is increasingly suspicious of men who owe their wealth to their ties to him and who are being hurt the most by U.S.