Update #3: CNN reports that sources close to negotiations say most of the remaining uncommitted superdelegate Senators will announce for Obama this week. Politico notes the 15 of them are meeting today to discuss an endorsement. Meanwhile Clinton still notes any one of the already declared superdelegates could switch at any point. Note they could also switch from her to Obama.

Update #2: Thomas B. Edsall is reporting that Obama & Clinton spoke yesterday and “agreed that their staffs should begin negotiations over post-primary activities.” According to the report Clinton is inviting top donors and supporters to a speech she will give following the primaries tomorrow night and that the move is “widely interpreted” as evidence she will suspend her campaign. (LA Times also looking at the signs)

Update: More evidence. Marc Ambinder reports Clinton staffers are being urged to turn in expense receipts by the end of the week a further sign to them that the campaign is ending. Mr. Clinton aides says he was referring to the end of the primary season and there are no remaining places for him to campaign for his wife concerning his earlier comment.

Despite the promise yesterday that the campaign would live on a flood of signals and signs are appearing all over the place that tomorrow will mark the end of the Clinton campaign.

Bill Clinton just said:

“I want to say also that this may be the last day I’m ever involved in a campaign of this kind. I thought I was out of politics, ’til Hillary decided to run. But it has been, one of the greatest honors of my life to go around and campaign for her for president,” said Clinton as he began his speech. (Video at CNN)

Meanwhile Senator Obama just announced at a Troy, Michigan event: “She and I will be working together in November.”

Earlier I noted Clinton advance people had been told their jobs were ending tomorrow and one of Clinton’s largest supporters Tom Vilsack has admitted defeat.

I would have to say it is unlikely Clinton will stay in past this week, with that said most of what has occurred this entire season has been unlikely so we will see.