The Flight Attendants Union Coalition wants its members' "pumps on the ground" campaigning, said the Association of Flight Attendants' Veda Shook.
"Over the next five weeks we are asking flight attendants to volunteer with their union local or their local Obama-Biden campaign office and help in any way they can," Shook said.
The coalition's move is hardly surprising. Members of the group backed Obama in 2008 and, for instance, the Association of Professional Flight Attendants' PAC has given 97 percent to Democratic candidates, according to the Center for Responsive Politics.
The flight attendants are the second union this week to back the president. The 185,000-member National Nurses United backed Obama on Monday, saying that a Romney administration would "further aggravate economic inequality.
This post has been updated. It was originally published at 3 p.m.
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