Struggling presidential contender Hillary Clinton campaigned in Puerto Rico on Sunday as she prepared for a pivotal ruling and sought to end a firestorm ignited by her reference to the 1968 assassination of Robert Kennedy. Clinton's husband, former President Bill Clinton, was to join her on Monday for a third straight day of campaigning on the Caribbean island, where she has been favored to win. But before the U.S. territory's Democratic presidential primary Sunday, Clinton faces a major showdown -- possibly the final one -- when Democratic Party officials meet to decide what to do with delegates from Florida and Michigan. A decision on Saturday in her favor by the Democratic rules committee is key to her uphill fight with Barack Obama to win the Democratic nomination at the party convention this summer and face Republican John McCain in the November election. The two states, which were stripped of their convention delegates for violating party primary rules, are believed to be making plans to allow at least some delegates to be counted. Obama, the Illinois senator, has a nearly insurmountable lead in the popular vote and pledged delegates. Campaign chairman Terry McAuliffe was asked if Clinton would accept a decision she did not particularly like. "I am not saying that today," he said, "I'm saying let them make their decision and then we will determine." At a series of campaign events across Puerto Rico, Clinton was greeted by crowds of several hundred people, chanting, "Hillary, Hillary." One man held a sign reading, "Quit." "We admire you as a woman of determination and intelligence," Perza Rodriguez, mayor of the town of Caborojo, told the former first lady at a beachfront rally. Puerto Ricans can help pick the Democratic nominee but do not have the right to vote in November's general election.