The nightmare scenario of the Obama campaign involves Hillary Clinton giving a cracking good speech the first or second night of the convention and then stampeding some Obama delegates to vote for her on the first ballot.

Frankly, this is almost impossible these days what with the iron control over one's own delegates a candidate can exercise. If it appears a delegate is wavering, they would have the state chairman pull the miscreant and send in a perfectly reliable sub.

But what does worry the Obama camp is Hillary Clinton stealing too much of Obama's thunder. Hence, negotiations are now underway between the two camps that would define her role at the convention:

Hillary Clinton won a hefty 1,600 convention delegates in six months of primaries. A big question now is whether to let them vote at the Democratic convention.

High on the list of matters that Sen. Clinton and likely Democratic presidential nominee Barack Obama are negotiating as her campaign closes down is whether and how her name is put into nomination at the August convention in Denver, said party activists in both camps.

A full roll-call vote that reminds everyone how close she came to being the nominee could reveal party rifts going into the fall campaign, they said.