Bill Clinton has three events on the island on Tuesday in support of wife Hillary

He told volunteers that were down around the mouth 'everybody knows the Clintons and...we started off at a real disadvantage' but he could still win

two hospitals in and around San Juan

Bernie Sanders is leaving no stone - or island - unturned as he searches for votes in the final stretch of the Democratic primary.

Sanders brought his 'underdog' campaign to Puerto Rico on Monday, as he ran around the territory's capital city, San Juan, and its suburb shopping his anti-Wall Street message.

The U.S senator visited two hospitals, had two town halls and held a rally at the Rio Piedras Campus of the Teatro de la Universidad in San Juan.

The territory has 60 pledged delegates, more than any other contest in June aside from California and New Jersey.

Sensing the importance of the late primary, Hillary Clinton dispatched husband Bill, to Puerto Rico this week, as well. He has three events on the Caribbean island Tuesday.

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Bernie Sanders is leaving no stone - or island - unturned as he searches for votes in the final stretch of the Democratic primary. He's seen here this morning n San Juan, Puerto Rico

At his second town hall of the day, at Escuela Juan Ponce de Leon Montessori in Guaynabo, Sanders also received a tour from one of the public school's students, 11-year-old Jack Hernandez

'This the playground?' he asked the boy, who told him the dilapidated, concrete school yard was indeed the play area. 'Needs a little work,' the senator added

The senator's supporters presented a dreary outlook during a stop at a field office today as they detailed the hurdles he faces in Puerto Rico leading up to the June 5 vote.

'We've been working here for a month, I think my voice reflects that. We all believe in the...political revolution for Puerto Rico,' one man told him. 'We have no resources in Puerto Rico. We are working very hard with nothing,

Sanders promised him 'we're gonna get you the resources' and asked what the word on the street was about his candidacy.

The gentleman offered a mixed bag.

'That people don't know you, but the people that know you and have heard the message, they just go with the message, and you have been saying that for years, if people hear this message they will follow it,' the man told him

Another man chimed in and said that despite the deficit, 'you have very loyal followers.'

Sanders took the feedback in stride and told them, 'What we're running up against, which is a real difficulty, everybody knows the Clintons.'

'We started off at a real disadvantage, but what I would say that when we began this campaign over a year ago, we were in a similar position, in that very few people outside of my own state of Vermont knew who I was.

'But the more people learn about our message....the more support we're getting,' he said. 'So our job is to give you the resources, and we will.'

The Democratic contender told them, 'We want to win this thing.'

A livestream of his first event of the day, at the Fundación Luis Muñoz Marín in a suburb of San Juan, had 17,000 viewers.

'That's pretty good,' he asserted. 'But that's what we have to build on, I agree.'

Giving his down in the mouth volunteers another pep talk, he said, 'We think we have the message to win here....we start off as a significant underdog, but if we can get the excitement and energy that we're seeing all over the United States, I think we can win here.'

Sanders later told DailyMail.com in response to a question about his complaints about the Democratic Party and the Clinton machine, 'Right here, in PR, the Clintons have obviously very very high name recognition.'

Bill Clinton was president for two terms. Hillary Clinton won Puerto Rico when she ran for president in 2008, he noted.

'So she has run a major campaign. That's what we're up against, and we have done well in overcoming that in the 50 states and we're starting back here.'

He added, 'I think the point that people are making is: we have the message, and we are just going to have to now get the volunteers and do it all over the island.

'And if we do that I think we're gonna do just fine.'

He said later at a rally, 'I know that I am running against someone who is widely known on the island.

'I know that we have an uphill battle, ' he added as they booed Clinton.

But on June 5, Puerto can 'go on record' saying that it wants a political revolution, Sanders said.

Sanders also stopped at a hospital in San Juan on Monday. He was greeted by local officials and the ACLU

Sanders unveiled a plan on Monday while in Puerto Rico to have the Federal Reserve restructure the territory's $70 billion of debt. 'If the Federal Reserve could bailout Wall Street, it can help the three and a half million American citizens in Puerto Rico,' Sanders said

This sign denouncing Hillary Clinton was posted at a gate outside of Sanders' town hall on Monday morning in San Juan

Sanders unveiled a plan on Monday while in Puerto Rico to have the Federal Reserve restructure the territory's $70 billion of debt.

'If the Federal Reserve could bailout Wall Street, it can help the three and a half million American citizens in Puerto Rico,' Sanders said.

Wall Streets is full of 'vulture funds' and 'vulture capitalists,' he repeatedly said, as he accused them the financial juggernauts of cutting health care and pensions for Puerto Ricans.

'These people really have no shame,' he declared at his evening rally.

Sanders also promised residents of the territory during his trip that he'd prioritize a binding referendum that gives them the option of statehood, independence or a redefined legal status.

'No matter what that decision is, clearly I think there needs to be a new relationship between the United States and the Puerto Rican people,' he said at his Guaynabo event.

He told his audience, 'A lot of people today perceive that they are in a colonial status. Yes?'

They agreed.

At his second town hall of the day, at Escuela Juan Ponce de Leon Montessori in Guaynabo, Sanders also received a tour from one of the public school's students, 11-year-old Jack Hernandez.

'This the playground?' he asked the boy, who told him the dilapidated, concrete school yard was indeed the play area. 'Needs a little work,' the senator added.

Another student later brought up deforestation to him and the case of a CVS pharmacy flattening a local park, and wondered what Sanders would do as president to make sure children have creative spaces like parks to play in.

'I do not know that particular CVS, but I do know that you're absolutely right and that children need creative and beautiful playgrounds,' Sanders told his young questioner.

He told the school child that his plan to revitalize the nation's infrastructure extends to parks.

'When we talk about building infrastructure, it means giving children the parks and the playgrounds that they need to enjoy themselves and to play and to learn,' he said.

Sanders promised the student, 'We will together build nice parks.'