The 24 states which refused to expand Medicaid under Obamacare are poised to give up $423.6 billion in federal funds over a decade and keep 6.7 million residents uninsured, according to a new study by the Urban Institute and Robert Wood Johnson Foundation.

“In the 24 states that have not expanded Medicaid, 6.7 million residents are projected to remain uninsured in 2016 as a result. These states are foregoing $423.6 billion in federal Medicaid funds from 2013 to 2022, which will lessen economic activity and job growth,” the authors wrote.

This chart comes via the Urban/RWJF study:

The non-expansion states — which include high-population Texas and Florida — feature Republican governors or legislators (or both) who blocked the federal funds. The expansion, initially required by Obamacare, was made optional by the Supreme Court. It covers residents up to 133 percent of the federal poverty line with a low price for states; Washington pays the full cost for the first three years and 90 percent thereafter.

Since September 2013 the number of uninsured fell by 38 percent in expansion states and just 9 percent in non-expansion states, the study found.

Democrats on the state and federal level widely support expansion; some GOP governors (like New Jersey’s […]