CORAL GABLES, Fla.  A day after Senator Barack Obama gathered a majority of pledged delegates in the Democratic presidential nominating contest, Senator Hillary Rodham Clinton defiantly sent out new signals Wednesday that she might take her fight for the nomination all the way to the party’s convention in August.

Mrs. Clinton stumped across South Florida, scene of the 2000 election debacle, pressing her case for including delegates from Florida and Michigan in the final delegate tally. On the trail and in interviews, she raised a new battle cry of determination, likening her struggle for these delegates to the nation’s historic struggles to free the slaves and grant women the right to vote.

But behind the scenes, the campaigns were working with the Democratic National Committee to resolve the dispute over the delegates before May 31, when the party’s rules committee is to decide the matter. Mrs. Clinton has said she wants all delegates counted and apportioned based on the popular vote of the two candidates in both states, although Mr. Obama did not appear on the ballot in Michigan.

Mr. Obama has said he wants the delegates seated but has not said how or in what proportion. David Axelrod, his chief strategist, said in an interview Wednesday that the campaign was willing to go beyond halfway in the apportionment.