Over the weekend, Sen. Hillary Clinton has told friends that she will NOT drop out today. Again, these conversations occurred over the weekend.
These friends expect that she will take a few days to think about her next move. They say she does not feel rushed and does not want to feel pressured. It is quite possible that Clinton makes a vice presidential overture in the speech; as in, she'll express a willingness to serve her party in any capacity deemed necessary to to unite the party. The Obama world seems still very cool to this idea.
In general, her speech tomorrow night will be a celebration of Hillary Clinton's campaign and her 17 million supporters. It will also be a summary of key points for undecided superdelegates.
Sens. Tom Harkin and Ken Salazar are trying to get the undeclared Senate superdelegates to endorse in one fell swoop; several dozen House members are planning to endorse Obama by Wednesday. Obama aides believe that they will have more than 2118 public pledges from pledged and automatic delegates by Wednesday morning.
John McCain's speech will focus on the arc of his career -- a life of putting the cause of service first, of being for something greater than himself... and will end with a call for responsible change and reform.
Barack Obama's speech, too, will be a celebration of his campaign... "very inspirational," according to an aide,... it will recognize HRC... and it will pivot to McCain using some new language.