Sen. Bill Cassidy on Monday proposed replacing enhanced Affordable Care Act premium tax credits with pre-paid health savings accounts . The Louisiana Republican's proposal comes as lawmakers scramble to find a remedy for skyrocketing costs of Obamacare health insurance premiums. The boosted ACA tax credits , which this year have lowered the cost of Obamacare plans for about 20 million Americans, are set to expire at the end of December. Cassidy's proposal would allow people who signed up for a