Health exchanges under the Affordable Care Act went online earlier this week. The New York Times reports the new healthcare law will leave out two-thirds of the nation’s poor blacks and single mothers and more than half of the nation’s low-wage workers who do not have insurance. That is because they live in 26 states controlled by Republicans that have rejected the vast expansion of Medicaid. The Supreme Court allowed states to opt out of the Medicaid provision earlier this year. Overall, up to seven million Americans are now ineligible for Medicaid.