Story highlights Hillary Clinton rolled out an expansion of her college affordability plan Wednesday

She proposed closing Wall Street tax loopholes to pay for the plan

(CNN) Hillary Clinton announced Wednesday a new college affordability plan based on conversations with her primary foe, Sen. Bernie Sanders.

Her proposal includes tuition-free enrollment in public, in-state colleges and universities for families of four making up to $85,000. The income benchmark would increase over four years to $125,000 -- covering about 80% of U.S. families.

Clinton's campaign, by updating her plan, hopes to win over Sanders supporters, even while the Vermont senator declines to drop out of the presidential race.

Sanders lauded Clinton's plan in a news conference Wednesday in Washington, saying it represents the best principles that both Democrats advocated.

"This proposal combines some of the strongest ideas which she brought forth during the campaign with some of the principals that I brought forth," he said.

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