DENVER -- A vote is expected Sunday on health care reform with the majority of Colorado's representatives planning to vote yes on the bill.

The proposed legislation, if enacted, would extend health insurance coverage to an additional 32 million Americans.

"I really think this bill helps make health care more affordable for most American families and small businesses, particularly for people who are self employed," said Rep. Jared Polis, D-Colo. He joins Colorado's other Democratic U.S. representatives in supporting the legislation.

However, Rep. Mike Coffman, R-Colo., said he plans vote against the bill.

"This legislation is really about a government take over of what remains of our health care system," he said.

Coffman said he's worried the bill would lead to higher premiums and taxes for middle-class families while resulting in deep Medicare cuts.

"I think there will certainly be an expansion in the Medicaid system. I'm worried that may lead to costs shifting onto private payers and cause rates to go up," Coffman said.

However, Democratic leaders argue the bill shouldn't hurt anyone, and should help those who need it most.

"For most people who get insurance through their jobs, that won't change. I hope the rate of increase will decrease. So the rates for insurance will go up less in future years with this legislation. But the people it really impacts are people with pre-existing conditions, who will be able to access health care, where as now it's cost prohibitive. For small businesses and people who are self employed, this will make health insurance more affordable for them as well," said Polis.

One hot button issue for both parties has been the cost of health care reform.

The non-partisan Congressional Budget Office estimated the legislation would cost $940 billion over 10 years while reducing the deficit by $138 billion.

Those numbers helped get support from some of the state's more fiscally conservative Democrats, including Rep. Betsy Markey, D-Colo., and Rep. John Salazar, D-Colo.

Coffman said he's not convinced.

"There's no question that the books were cooked to arrive at these numbers, because the Congressional Budget Office is not allowed to challenge the assumptions given to them by members of congress when scoring a bill," Coffman said.

The house is expected to have a vote on the bill Sunday afternoon. They must have 216 "yes" votes to pass. If that happens, the bill would go back to the senate for the reconciliation process.