Trump's new brief against ACA deals a huge blow to GOP Senate candidates. Martha McSally is up *right now* with an ad vowing to protect preexisting conditions; this blows that up. All this lunacy makes reform more likely next year.@paulwaldman1 and me:https://t.co/VOMjaRL8EZ— Greg Sargent (@ThePlumLineGS) June 26, 2020