MoveOn.org is rallying people for a “99% Congressional Speak-Out” at 4 p.m. Thursday at the Cambridge office of U.S. Rep. Mike Capuano — who is taking questions by phone at 7:15 p.m. today —  “to make sure he hears how badly we need him to stand up for the 99 percent in the final days of 2011,” according to Lenore Palladino, an organizing director of the political group.

“Speakouts are simple events that give people the chance to share their stories and messages with politicians and the media,” Palladino explained in an e-mail urging attendance.

Reasons for the nationwide effort cited in her e-mail:

Senate Democrats are proposing an extension of small but helpful tax cuts for the 99 percent — paid for by a surcharge on millionaires. But Republicans in the Senate are now lining up to oppose the same tax cuts they already supported. … With votes on unemployment benefits, Medicare payments, and a Wall Street tax likely before the end of the year, the lines have never been clearer. This final month of 2011 will force every member of Congress to show who they really represent.

The telephone meeting with Capuano, a Democrat in his seventh term, is reachable by dialing 1 (877) 229-8493 and punch in the number 13034 when prompted. To ask a question, press *3 after joining the meeting.

The speakout is at 110 First St., near the Lechmere stop on the MBTA green line.

Capuano will not be on hand for the event. “He’ll be in D.C.,” a representative said Wednesday.

A redistricting that will carve Cambridge in two makes Capuano one of two U.S. Reps. who will be representing Cambridge. He will have the new 7th Congressional District, made up of parts of the city in North Cambridge and closer to the river, while U.S. Rep. Edward Markey will be representing the central chunk in the new 5th Congressional District.