[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/POLITICS/05/24/campaign.wrap/art.obamapr.ap.jpg caption="Sen. Barack Obama talks to veterans in Puerto Rico on Saturday morning."]
BAYAMON, Puerto Rico (CNN) - Sens. Hillary Clinton and Barack Obama took their campaigns to the U.S. territory of Puerto Rico on Saturday in an effort to woo voters before the June 1 primary.
There are 55 Democratic delegates up for grabs, though voters cannot take part in the general election in November.
Obama campaigned early Saturday at the University of Puerto Rico in Bayamon, where he praised the nation's veterans before Memorial Day.
"It's fitting to be here today, not just because Memorial Day is around the corner but because Puerto Ricans are such an important part of the United States military. On this island and in Puerto Rican neighborhoods across America, you can go into almost any home and find a veteran living there or a photograph of a loved one in uniform hanging on the wall," he said.
Obama also took aim at Republican Sen. John McCain over his opposition to an update of the GI Bill. The legislation passed the Senate on Thursday afternoon by a 75-22 vote and passed the House this month by a similar margin. It proposes to essentially provide a full scholarship to in-state public universities for members of the military who have served for at least three years.
"I don't understand why John McCain would side with George Bush and oppose our plan to make college more affordable for our veterans. ... Putting a college degree within reach for our veterans isn't being too generous; it's the least we can do for our heroes," Obama said.
Shortly after Obama's remarks, the McCain campaign hit back.
"Barack Obama talks about helping veterans, but when the choice came between delivering for our military men and women and playing partisan politics, he decided politics was more important," McCain spokesman Brian Rogers said Saturday.
Clinton, meanwhile, hosts a "Solutions for Puerto Rico's Families" town hall in Aguadilla on Saturday.
Clinton has done well among Hispanic voters in this year's primaries. She is expected to do well Puerto Rico's primary; Puerto Ricans make up a large swath of her New York constituency.