Democratic presidential hopeful Bernie SandersBernie SandersOcasio-Cortez: Sanders' heart attack was a 'gut check' moment Ocasio-Cortez tweets endorsement of Sanders Ocasio-Cortez throws support to Sanders at Queens rally MORE toured the home and grave of Franklin D. Roosevelt in New York late Tuesday, connecting his own fight against the "billionaire class" to the work of the 32nd president.

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"I think there is a lot that we can learn today from Roosevelt's life and courage, from his willingness to stand up to the most powerful special interests of his time — people he called the economic royalists, people I call the billionaire class today," the Vermont senator said, according to The Associated Press.

"In 1936, when he was re-nominated by the Democratic Party for another term as president, he proudly proclaimed that he welcomed the hatred of the economic royalists — that he stood with the working class and the oppressed people of this country, and that's what he did."

Sanders's pit stop came before a rally in the Hudson Valley in New York, part of a lengthy campaign trip through the state before next week's critical primary.

Later, at a rally at Marist College in Poughkeepsie, N.Y., Sanders commended Roosevelt's "Second Bill of Rights," which called for a right to employment and rights to fair income, housing, medical care, Social Security and education.

"Roosevelt was right back in 1944, and we still have not achieved that goal," Sanders said, according to the AP.