Liberal bloggers are also calling on Wynn to step down now.
In her call for Wynn to leave, MyDD's Natasha Chart notes that the firm Wynn will join, Dickstein Shapiro, represents AT&T and a host of other big firms who could benefit from legislation in the House.
Chart writes: "If the House votes on telecom immunity, energy or global warming policy, a final version of the farm bill, or a bailout of our nation's utterly irresponsible financial services sector... on whose behalf will he be voting?"
The non-profit group Citizens for Responsibility and Ethics in Washington (CREW) also wants Wynn to skedaddle because of conflict-of-interest concerns.
Before accepting the lobbying post, Wynn was scheduled to leave at the end of the year. He lost a primary against Donna Edwards in February, thanks partly to attacks from liberal blogs Open Left and Daily Kos that viewed him as too close to big business.