After Barack Obama won the Maine caucuses Sunday, he sat down at the keyboard of his computer to write an e-mail.

The recipient? Not a media consultant. Not a superdelegate. It was banker Robert Wolf, the CEO of UBS Americas (UBS).

The two exchanged notes about the Senate-passed economic stimulus package and that weekend’s G-7 economic summit.

A banker as Barack Obama’s pen pal?

It many seem hard to believe, Business Week notes, given the senator’s liberal image, but Obama has also taken time to consult with Warren Buffett, whose support of rolling back the Bush tax cuts Obama often cites.

Reportedly, Barack Obama has also been in touch with former Federal Reserve Chairman Paul Volcker, who endorsed him in January.

“I found him to be unbelievably refreshing, smart and thoughtful,” says Wolf, who met Obama through financier George Soros.

Still, Corporate America may not be persuaded easily.

He has a mere three years in the U.S. Senate, a desire to roll back the Bush tax cuts that benefit many people running big companies, and a lower rating by the U.S. Chamber of Commerce than Hillary Clinton and John McCain.

But Tuesday’s Chesapeake Bay massacre proves Obama is now a serious contender for the Democratic nomination. How will Big Business react if faced with an Obama candidacy? Or an Obama presidency?

Continue reading Business Week’s take on business and the Senator …