Pro-Trump states most affected by his health care decision

President Donald Trump's decision to end a provision of the Affordable Care Act that was benefiting roughly 6 million Americans helps fulfill a campaign promise, but it also risks harming some of the very people who helped him win the presidency.Nearly 70 percent of those benefiting from the so-called cost-sharing subsidies live in states Trump won last November, according to an analysis by The Associated Press. The number underscores the political risk for Trump and his party, which could end up owning the blame for increased costs and chaos in the insurance marketplace.The subsidies are paid to insurers by the federal government to help lower consumers' deductibles and co-pays. People who benefit will continue receiving the discounts because insurers are obligated by law to provide them. But to make up for the lost federal funding, health insurers will have to raise premiums substantially, potentially putting coverage out of reach for many consumers.Some insurers may decide to bail out of markets altogether. The National Association of Insurance Commissioners has estimated the loss of the subsidies would result in a 12 percent to 15 percent increase in premiums, while the nonpartisan Congressional Budget Office has put the figure at 20 percent. Experts say the political instability over Trump's effort to undermine Obama's health care law could prompt more insurers to leave markets, reducing competition and driving up prices.