Discuss as:

Transportation workers to back Obama

From NBC's Domenico Montanaro and Doug Adams
The 200,000-member Transportation Workers Union will move from Edwards to Obama tomorrow, according to sources close to the union. The union would be the first national AFL-CIO union to endorse Obama. Is this the first of several former Edwards-backed unions to go to Obama now that Edwards has pulled out of the race?

The TWU represents New York City subway workers, Philadelphia bus drivers, Southwest Airlines flight attendants, baggage handlers and others. The largest union is in New York -- a Feb. 5 state -- and could play an active role there. In other Feb. 5 states, there are members in California and New Jersey.