Although technically not yet a candidate, state Senate Majority Leader Robert J. Garagiola (D-Montgomery) is already beginning to roll out supporters in his expected campaign for Maryland’s redrawn 6th Congressional District.

The seat, held by Rep. Roscoe G. Bartlett (R), was altered in the redistricting map approved last week to become more favorable to Democrats by stretching into Montgomery County. Garagiola, whose Senate district fits nicely into the new congressional seat, is planning to officially enter the contest soon, and former Montgomery County Council member Duchy Trachtenberg (D) is also running.

On Monday, Garagiola rolled out his first wave of public endorsements, including three Democratic state senators from Montgomery: Jennie M. Forehand, Nancy J. King and Karen S. Montgomery and one, Ronald N. Young, who represents Frederick and Washington counties.

Garagiola also touted endorsements from 13 delegates, including House Majority Leader Kumar P. Barve (D-Montgomery).

It’s not clear whether any other high-profile Democrats will enter the race. With the help of a Garagiola ally, state Senate President Thomas V. Mike Miller Jr. (D-Calvert), the 6th District was drawn in such a way that it excludes the households of many prominent Montgomery Democrats who might be interested in a congressional run.

Asked this month whether he would consider a bid, former Montgomery county executive Douglas M. Duncan (D), a Rockville resident, said: “I don’t live in the district.” Duncan did not respond to subsequent phone calls seeking further comment.

On the Republican side, Bartlett has said he will run for reelection, but he could still change his mind or face a primary challenge from a fellow Republican such as former state senator and current state GOP Chairman Alex Mooney.