She and her campaign's national chairman, Terry McAuliffe, both made it clear Sunday night that Obama's supporters were now fair to pluck with those arguments.
To drive the point home, Clinton invited Virgin Islands superdelegate Kevin Rodriguez, a recent convert, to travel with her to South Dakota where she planned to campaign Monday. Rodriguez had initially supported Clinton, switched to Obama, and recently returned to her camp.
"This has been such an intense process," she said, "I don't think there has been a lot of time for reflection. It's only now that we're finishing these contests that people are going to actually reflect on who is our stronger candidate."
Her decision, if prolonged, is not likely to sit well with party leaders and some of her own supporters. House Speaker Nancy Pelosi, D-Calif., and Senate Majority Leader Harry Reid, D-Nev., have both called on the contest to end shortly after the final primaries.
Tom Vilsack, the former Iowa governor and a national co-chairman of Clinton's campaign, said Sunday: "It does appear to be pretty clear that Senator Obama is going to be the nominee. After Tuesday's contests, she needs to acknowledge that he's going to be the nominee and quickly get behind him."
Eager to make amends for avoiding Michigan's primary and build general election support, Obama on Monday planned to hold a town hall meeting on the economy in Troy, Mich.
Clinton, meanwhile, said she was still contemplating whether to challenge the decision by the Democratic Party's rules committee to split the Michigan delegates 69-59 in her favor. Each delegate would have a half vote. The agreement granted Obama 55 uncommitted Michigan delegates and four who would have been assigned to Clinton based on the state's results.
McAuliffe Sunday night called the panel's judgment "outrageous."
"People are angry," he said. "This does not unify our party, this crazy, cockamamie thing they came up with in Michigan."