Massachusetts' entire all-Democratic congressional delegation has endorsed Democratic presidential candidate Hillary Clinton, with the exception of U.S. Sen. Elizabeth Warren.

"As a longtime friend and supporter, I know Hillary's record and continued commitment to fighting for working families in New England and across the country make her the clear choice in 2016," said U.S. Rep. Richard Neal, of Springfield, the dean of the congressional delegation.

Although most of the officials have publicly endorsed Clinton already, Clinton announced the formation of a "Massachusetts Leadership Council" on Monday, a group of 190 politicians, labor leaders and community organizers who will help her campaign before Massachusetts' presidential primary.

The list shows the enormous breadth of Clinton's support in Massachusetts, a heavily Democratic state. But Warren's absence is glaring.

Despite being a first-term senator, Warren has become a leader of the more liberal wing of the Democratic Party. Her endorsement could have significant sway both in Massachusetts and nationally among progressives - who are the group most likely to be attracted to Clinton's main primary opponent, Vermont U.S. Sen. Bernie Sanders. So far, Warren has not endorsed anyone in the primary.

Other than the members of Congress, Clinton's leadership council includes three of the four statewide elected officeholders who are Democrats - Attorney General Maura Healey, Treasurer Deb Goldberg and Auditor Suzanne Bump. (Secretary of the Commonwealth William Galvin is the only Democratic statewide elected officeholder not on the list.)

Senate President Stanley Rosenberg, D-Amherst, is a member, although House Speaker Robert DeLeo, D-Winthrop, notably is not. Clinton also cited support from 22 of the 34 Democratic state senators in Massachusetts, and 63 of 125 Democratic state representatives.

"Hillary Clinton's commitment to fighting for working families, her comprehensive policy agenda, and breadth of experience are exactly what we need to continue moving Massachusetts, and the country, forward," Rosenberg said in a statement.

The list includes a number of mayors, including Holyoke's Alex Morse and Worcester's Joseph Petty; district attorneys; and sheriffs, including Hampden County's Michael Ashe and Hampshire County's Robert Garvey. Springfield city councilors Michael Fenton, Henry Twiggs and Bud Williams are also on the council.

Former governor Michael Dukakis and his wife Kitty Dukakis are named as Clinton supporters, along with former congressmen Barney Frank and Joe Kennedy, former attorney general Martha Coakley, former treasurer Steve Grossman, former Senate present Therese Murray, former acting U.S. Commerce secretary Cam Kerry, and a number of union and community leaders.

With a March 1 primary, Massachusetts is one of the first states to vote after the four early nominating states. Clinton is likely hoping that an overwhelming showing in the so-called Super Tuesday states will help her sew up the nomination without a prolonged fight against Sanders or former Maryland governor Martin O'Malley.

Massachusetts supporters are also important for any candidate, because they can easily travel to campaign in New Hampshire, the first primary state. Massachusetts is also a hub for political fundraising for Democrats because of its large number of wealthy Democratic donors, and sitting politicians can connect Clinton to their donor networks.