Sen. Ted Cruz (R-TX) is known for waging political battles even if the odds of success are slim. He famously launched a 21-hour filibuster in a failed, last-ditch effort to repeal Obamacare. But his latest crusade may be his biggest challenge yet: repealing a federal law that does not exist.<br /><br />On Twitter, Cruz blasted the federal government role in education and called for the repeal of Common Core.<br /><br />Can Cruz “make DC listen”? It will be particularly hard since Common Core is not, in fact, a federal law. <br /><br />Full story: http://thinkprogress.org/education/2015/03/16/3633972/ted-cruz-makes-impassioned-plea-repeal-federal-legislation-not-exist/