Continued from page 1

“As is true in all conventions, we’re still working out the mechanics, the coordination,” Mr. Obama said.

There are some thorny issues still to be worked through. In an online chat on her Web site Thursday, Mrs. Clinton said she has not yet decided whether she will ask for a vote at the convention.

“I know that there have been a lot of questions on this subject. Senator Obama and I share the goal of ensuring that the voices of everyone who participated in this historic process are respected,” she said. I want to assure everyone that we are working together with Senator Obama’s campaign and the DNC, and I am confident we will have a successful and unified Convention in Denver.”

The back-and-forth over the Clintons’ convention roles, coupled with recent ambiguous comments from each, have left pundits wondering how dedicated the former first couple is to Mr. Obama’s victory. Mrs. Clinton told supporters last month her delegates needed to feel validated in the process.

In her Web chat Thursday Mrs. Clinton indicated she would be open if Mr. Obama asks her to be his running mate. She mentioned Mr. Obama 13 times during the chat, pledging “to continue to do whatever I can to help Senator Obama and Democrats across the country win in the November.”

With Mr. Obama heading to vacation in Hawaii, Mrs. Clinton begins campaigning on behalf of Mr. Obama today in Nevada, a state she won during the primaries. Later this month she will campaign in Florida, which she also won.

Mr. Clinton reportedly will speak at the convention on Wednesday night, some time before the eventual vice presidential nominee speaks that night. Mrs. Clinton is expected to speak Tuesday night.

For Republicans, the White House has said President Bush will speak Monday night. Mr. Cheney’s office said details of his speaking slot are still being worked out.

Jon Ward contributed to this article, which is based in part on wire service reports.