Democrats are looking for someone to blame for their electoral woes — and Democratic Senatorial Campaign Committee Chairman Robert Menendez is working hard to make sure it’s not him.

Showing that they’ve learned the lesson of Massachusetts, Menendez and his staff will distribute a memo Tuesday advising Democratic campaign managers to frame their opponents early — and to drive a wedge between moderate voters and tea-party-style conservatives.

“Given the pressure Republican candidates feel from the extreme right in their party, there is a critical — yet time-sensitive — opportunity for Democratic candidates,” the DSCC writes. “We have a finite window when Republicans candidates will feel susceptible to the extremists in their party. Given the urgent nature of this dynamic, we suggest an aggressive effort to get your opponents on the record.”

The memo urges Democratic candidates to force their opponents to answer a series of questions on health care, taxes and some of the favorite causes of the far right...