Jimmy Kimmel escalated his war of words with Sen. Bill Cassidy over his proposed Obamacare repeal bill Wednesday night, blasting the lawmaker for “defending the indefensible” and continuing to support a measure he said was “by many accounts the worst health-care bill yet.”Kimmel torched Cassidy for saying earlier Wednesday that the late-night host “does not understand” his health-care bill, adding that the Republican senator from Louisiana “either doesn’t understand his own bill or he lied to me.”After a long and detailed critique of the bill, where he cited numerous health-care advocacy groups that opposed Cassidy’s legislation, Kimmel insisted the problem was not his own lack of comprehension, but rather the lawmaker’s inability to be forthcoming.“When Sen.