State Rep. Dan Winslow will not ban the use of outside money during his run for U.S. Senate, his campaign announced today.

“For congressmen Markey and Lynch to posture about outside money in politics when their coffers are already filled with money from outside Massachusetts just shows you how inauthentic this pledge really is,” Winslow said in a statement. “And the national Democrats already are spending money here by sending in their dirty tricks troops to my town. I welcome any outside group to contribute positive bio or issue ads, mailings, social media and the like. I am running a different kind of campaign. I am not an entrenched Washington insider who has to sign a pledge in order to run a fair, clean, positive campaign.”

U.S. Reps. Ed Markey and Stephen Lynch agreed yesterday to take the “People’s Pledge,” to keep outside money out of the Democratic primary.

A similar agreement, called "The People's Pledge," was used during U.S. Sen Elizabeth Warren's win against former Sen. Scott Brown.