[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/05/29/art.clintonp.ap.jpg caption="Clinton campaigned in Puerto Rico over the weekend.'"](CNN) - Hillary Clinton holds a double-digit lead in Puerto Rico, a new poll out Thursday suggests.
According to the new survey conducted for the newspaper El Vocero and Univision, the New York senator is leading Barack Obama there 51 percent to 38 percent among all adults in the commonwealth's primary this Sunday. The poll also show 52 percent of Puerto Ricans view Clinton favorably while 42 percent have a positive view of Obama.
The weekend primary will likely be the New York senator's last chance to boost her popular vote total, since Obama is widely viewed to have an advantage the final two primaries that vote Tuesday - South Dakota and Montana.
The survey was conducted May 8-20. Given the length of the survey time, it is possible it may not reflect the current views of Puerto Ricans since both candidates have visited the island since the polling began, and other recent developments on the campaign trail may have swayed voter's minds there.
Both Obama and Clinton paid visits to the island over the weekend, and Clinton is planning a return trip at the end of the week. Former President Bill Clinton and daughter Chelsea have also spent the majority of the week campaigning throughout the island, hoping to drum up a high turnout.
"You will never have a chance to vote for some one who cares more who has done more and who will do more as president," Bill Clinton told potential voters in San Juan Wednesday. "So I ask you all show up and be there for her. Talk to your families talk to your friends. Send a message back to the mainland on Sunday that Puerto Rico deserves to be considered and its potential is unlimited if only you had a genuine partner in the White House."
Fifty-five delegates are up for grabs, more than were awarded in each of the three most recent voting states - Oregon, Kentucky, and West Virginia.