One of the biggest banks in the world wants the president’s favorite banker muzzled. The banker, Robert Wolf, a top UBS executive in New York, is among President Obama’s leading fund-raisers, building more than more than $500,000 for his re-election so far this year. A regular presence at big campaign fund-raisers, Mr. Wolf, who is 50, golfs and vacations with Mr. Obama and is known for e-mailing friends photos of himself with the president. -snip- Mr. Wolf and Mr. Obama met in late 2006 at a reception held at the offices of the billionaire investor George Soros. The two became...