http://www.consumerreports.org/medicaid/whos-on-medicaid-might-surprise-you/
Yes, half are children, many disabled. Another one quarter are disabled adults or the elderly, many in nursing homes. And many of the able bodied adults ARE working, but their jobs don't offer health care benefits, and they earn so little that they qualify. The problem with Trumpcare is that it slashes medicaid, not only the ACA expansion, but it slashes benefits to levels even before the ACA, and proposes that the states, instead of the federal government, pay for it. It would also cap benefits for individuals.
Not fake news. If you do an internet search you will find other sources with the same information.