Sen. Barack Obama late last night picked up an endorsement from D.C. Delegate Eleanor Holmes Norton, a super delegate who said he is what "our country, our party and this city needs at this turning point in our history."

Norton said she had planned to wait until closer to the general election to endorse a candidate. But "as a super delegate, I decided I had to speak up now to separate myself from the idea that is afoot for the first time that super delegates, especially those who have not announced their choice, could or should decide our nominee under some circumstances."

"The notion that a candidate who has not earned delegates could become the Democratic nominee for president is at odds with the democratic principles of our party reforms. Super delegates were never intended to allow the return of smoked-filled room, behind the scenes selection of our candidate," Norton continued. "I have carried a banner for a democracy of the District of Columbia too long to depart from principles of democracy within my own party."

"I appreciate that Senator Obama is not new to D.C. voting rights but is a co-sponsor of our D.C. Voting Rights bill," she said. "I believe that Senator Obama as president will be invaluable in helping to shift left-over home rule authority from the Congress that should be with the city."

I have a story up this morning about the importance of the Potomac region's trio of primaries.

Sen. Barack Obama aimed to continue his streak of victories with decisive wins in the Potomac region's trio of primary elections today as Sen. Hillary Rodham Clinton already was looking ahead to bigger contests to make up for lost ground.

Obama volunteers working the crowd for him at a University of Maryland rally yesterday pushed supporters to sign up to canvass neighborhoods in both states, while D.C. Democrats were treated to automated phone calls from Mayor Adrian M. Fenty.

"Imagine a president who will put principle ahead of polls ... now imagine knowing that you made it possible. Vote for Barack Obama tomorrow," Mr. Fenty says on the calls.

Clinton volunteers worked the phones to get out the vote, and Republicans also vote today in the three contests.

Read the rest here.

Check out this pretty amazing Washington Times photo gallery with audio focusing on Sen. Hillary Clinton, courtesy of photo diva Katie Falkenberg.

Also, Gary Emerling has a great piece up today on the energized youth vote.

Michelle Obama this morning sent supporters a note to say "America is watching the District of Columbia" and urging them to get out and vote.

"We're heading into today's primary after winning all four contests this weekend, but this race is still extremely close," she said.

Clinton sent supporters a note today as well:

You and I have taken a remarkable journey together through this entire campaign. Through all the ups and downs, you have been there when I needed you most. And today, I'm asking you for the most important thing of all — I'm asking for your vote.

Today in Washington, D.C., voters will head out to the polls to make their choice for president. We both know that our country needs a leader who is ready to lead on day one. After seven years of a president who listens only to the special interests, America is ready for a president who brings your voice, your values, and your dreams to the White House.

I'm relying on my strongest supporters like you to help me win the nomination, and there is nothing more important than getting out to vote. When you go to the polls in the District today, bring a friend, a neighbor, or a family member with you - in this highly competitive race for the nomination, every vote matters.

Thank you for all you have done for me and our campaign.

Hillary

UPDATE, 9:05 a.m.: Team Clinton announced this morning astronaut John Glenn is endorsing her at a campaign event in Ohio.

— Christina Bellantoni, national political reporter, The Washington Times