From the Washington Post:

Returning to Washington yesterday, Obama was mobbed by well-wishers as he walked onto the House floor. But behind the scenes, his campaign worked with a light touch to win over uncommitted superdelegates and allies of Clinton, mindful of not appearing overconfident and of the fact that they would need the backing of the candidate, her husband and their supporters in the fall.

... With numerous prominent Democrats believed to be waiting in the wings to endorse his candidacy, Obama appears poised to win [the majority of pledged delegates] as early as May 20, when Kentucky and Oregon vote.

... [Obama won] two new superdelegate endorsements yesterday, from Reps. Rick Larsen (Wash.) and Brad Miller (N.C.). Many other unaligned lawmakers said they are likely to remain on the sidelines for the time being, in deference to Clinton.

"Superdelegates understandably would prefer not to be seen as the deciding factor," Obama told reporters between meetings at the Capitol, brushing aside the suggestion that a mass endorsement is in the offing. "I think they respect the process, they respect Senator Clinton and myself."

... In addition to competing in the six remaining contests, Obama will mix in stops to battleground states in the coming weeks, advisers said.

... "We're not going to wake up in the morning after we become the nominee and be unprepared," said campaign manager David Plouffe.

The team is beginning two major grass-roots programs. "Vote for Change," a voter registration drive aimed at signing up millions of Democrats over the next six months, will begin tomorrow with 100 events in all 50 states. An army of "Organizing Fellows" is also being recruited -- full-time volunteers who will be deployed to swing states.

From The Hill:

When unpledged superdelegates Brad Miller (D-N.C.) and Rick Larsen (D-Wash.) became the latest members of Congress to endorse the Illinois senator on Thursday, Obama for the first time in the Democratic presidential primary race tied Sen. Hillary Rodham Clinton (N.Y.) in the number of public endorsements from lawmakers [Senators and members of the House of Representatives].

Ten months ago, Clinton led Obama in endorsements from legislators, 51-22. Three months ago, she was up 90-62.

Long gone are the days in which it seemed more than unlikely that a first term senator could get more pledged support among members of Congress than a former first lady whose roots reach deep into the party.

As though he knew that Thursday would be the day in which he caught Clinton in yet another statistic, Obama made a triumphant visit to the House floor earlier in the day and enjoyed a celebrity's welcome.

What makes his latest feat so impressive, apart from the fact that many of the Democrats in the House worked closely together with President Clinton in the 1990s and knew the former first lady from that time, is that it is not just the young lawmakers who have been captivated by Obama's message of hope and change.

Eight of his Senate supporters are committee chairmen. In total, Obama's 14 Senate backers have been serving in the upper chamber for more than 250 years.

In all, Obama and Clinton now have the public support of 99 lawmakers and it is likely that Obama will hit the century mark first.

From the Bowling Green Daily News:

With two weeks remaining until the state primary election, local supporters of Sen. Barack Obama's presidential campaign got a boost Tuesday thanks to a visit from one of the Illinois Democrat's more prominent backers.

Former Mississippi Gov. Ray Mabus spoke to about 20 supporters and campaign volunteers at the Obama campaign's Bowling Green office, motivating them to make as many calls as they can to potential voters and urging them to support Obama.

"For the first time in a long time, we've got a candidate in Barack Obama who doesn't try to divide us," Mabus said.

At the time of his election in 1987, Mabus was the youngest governor in the United States.

... [Mabus] believed that Obama's performances in several primary victories makes him best qualified to take on Republican Sen. John McCain in the general election.

"States that Republicans have taken for granted are going to be back in the mix and we need a strong person at the top of the ticket," Mabus said.

Obama won the Mississippi Democratic primary with 61 percent of the vote.

From KDLT TV:

It was business as usual today for those working for [the Obama campaign].

Senator Barack Obama's campaigners spent the day talking to South Dakota voters about 'his' plans for the presidency.

Obama's SD Director, Nathan Peterson says, "We started our campaign in SD over a month ago and had a very aggressive effort to get out one on one the phone calls and canvassing efforts and get out the message of Obama's positions on reducing cost of gas, food, trying to make healthcare more affordable in SD and across the country."

Senator Obama is planning on a campaign stop in South Dakota as soon as a schedule can be worked out.

From the East Oregonian:

Presidential candidate Barack Obama's campaign in Oregon has officially opened an office in Pendleton and plans a open house 5-8 p.m. Thursday.

The office at 27 S.W. Frazer Ave. is the northeast Oregon headquarters for the Obama for America campaign. And it may be the first official presidential campaign office in Pendleton during primary season since Robert Kennedy opened one in 1968.

Although this week the office is an official part of Obama for Oregon, supporters of the Democratic senator from Illinois have worked out of the space for more than a week.

... The Obama campaign has 17 offices in Oregon, and Shapiro said there may be more to come. That just goes to show the "personal touch" this campaign is using to spread Obama's message of change, Shapiro said.

Before the Pendleton office made the list, the Obama campaign was active in the area with plenty of volunteers, something Shapiro said has been happening since the start of the presidential race.

He said Oregon volunteers organized and starting campaigning for Obama as a grassroots effort long before the candidate formally set up shop in the state.

Shapiro also said he's heard about unofficial Obama offices in other communities.

"We are all over this state," Shapiro said.