The federal government operates the health insurance exchanges in 36 states but is financially supporting those being operated by 14 states and the District of Columbia. Those marketplaces are supposed to be self-sustaining by next January under the federal Affordable Care Act. Exchange officials in some states say they are on track for self-sufficiency, while lawmakers elsewhere are questioning the solvency of their states’ exchanges. The amount of federal grant money received to date for all the state-run exchanges is nearly $3.8 billion. The breakdown by state: