One-third fewer Americans paid the ACA's penalty for not maintaining minimal essential coverage compared to the same period last year, but IRS has collected 20 percent more from those penalties, according to a mid-season report from the Treasury Inspector General for Tax Administration (TIGTA) released last week. The report on tax filings through early March comes amid concerns that the Trump administration will not proactively enforce the ACA's individual mandate, which could further undermine the insurance markets. According to the...