He was once described as having a mix of "entrepreneurial know-how and evangelistic zeal," and a preference for black T-shirts and four-day-old beards over suits and ties. Meet David Jacobson, a senior fundraiser for Barack Obama who is poised to become the next United States ambassador to Canada. This "smart, talented" Chicago lawyer would be an "inspired choice," Washington sources say. Reached at the White House yesterday, Jacobson, 57, politely declined to talk about the speculation he would soon be coming to Ottawa to represent the United States. .... Jacobson was a partner at the Chicago law office of Sonnenschein...