Many people who are on Medicaid are also in college or taking care of relatives, according to health policy analyst Leighton Ku. That would make it harder for them to meet work requirements proposed by the GOP. Courtesy of Milken Institute School of Public Health hide caption

The Navajo Generating Station located on the Navajo Indian Reservation, near Page, Ariz. Amber Brown/Courtesy of Salt River Project hide caption

Mary Lynne Bill-Old Coyote, Montana's director of Indian health, says the ACA has helped build the community by providing job opportunities. Montana saw 3 percent growth last year in the number of health care jobs. Courtesy of Thom Bridge/Helena Independent Record hide caption

Johnstown, Pa., nestled in the Allegheny mountains, has more registered Democrats than Republicans, but has voted Republican in the last two presidential elections. Acacia Squires/NPR hide caption

President Obama speaks to Caterpillar employees in East Peoria, Ill., in February 2009 about the then-struggling economy. Charles Dharapak/AP hide caption

Striking McDonald's restaurant employees lock arms during nationwide "Fight for $15 Day of Disruption" protests. David McNew/Getty Images hide caption

UCSF is laying off some of its IT staff and sending their jobs to a contractor with headquarters in India. Luciano Lozano/Getty Images/Ikon Images hide caption

Across the Ohio River from Powhatan Transportation Center — owned by Murray Energy — is a power plant that services mines in West Virginia. Jessica Cheung/NPR hide caption

President-elect Donald Trump tours the Carrier Corp. in Indianapolis on Dec. 1. The president of the union representing Carrier workers has challenged Trump's claims about how many of the plant's jobs will remain in the U.S. Jabin Botsford/The Washington Post/Getty Images hide caption

A man speaks with a potential employer Sept. 13 at a job fair in Hartford, Conn. Recent wage gains reflect the steady healing of the labor market since the worst of the Great Recession. John Moore/Getty Images hide caption

(Left to right) Promoter Eddie Jaffe (center) watches Rubin "Hurricane" Carter sign a contract before a fight in 1964; Sharon Griggins; Eddie Arroyo weighs in at Arlington Park in Chicago; policeman Renault Robinson in 1970. Bettmann Archive/Getty Images; Courtesy of Sharon Griggins; Courtesy of Eddie Arroyo; Lee Balterman/The LIFE Images Collection/Getty Images hide caption

Democrat Hillary Clinton, left, and Republican Donald Trump, right, will debate for the first time Monday night. AFP/AFP/Getty Images hide caption

Customers use interactive kiosks to place orders at Eatsa, a fully automated fast food restaurant in San Francisco. Justin Sullivan/Getty Images hide caption