Hillary Rodham Clinton won another overwhelming victory over Barack Obama on Sunday—this time in Puerto Rico—even as many Democrats, including some of her supporters, suggested it would be best if she dropped her threat to battle on past the end of the primary voting on Tuesday.

“There’s nobody taking Hillary’s side but Hillary people,” said Donald Fowler of South Carolina, a former national party chairman and one of Clinton’s most prominent supporters, referring to her campaign’s suggestions that she might seek to challenge the way the party resolved the fight this weekend over seating the Michigan and Florida delegations. “It’s too bad. She deserves better than this.”

In a telephone interview Sunday from San Juan, Puerto Rico, Clinton still raised the possibility that she would challenge the party’s decision on seating those delegates. “Well, we are going to look at that and make a determination at some point,” she said. “But I haven’t made any decision at this time.”

Heading toward what is shaping up as something less than a triumphant moment of victory as the voting draws to a close, Obama spent Sunday in South Dakota for a last-minute schedule of campaigning. He was in the state, which will vote along with Montana on Tuesday to complete the primary season, trying to thwart a last-minute effort by Clinton to pull out a victory there and build her case that she would be the stronger candidate in the general election.

The dimensions of Clinton’s challenge were underlined as two more superdelegates signed on to Obama.

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