Doubts have been cast on the accuracy of a story about horrific child sex abuse told by the Republican senator Katie Britt in her widely ridiculed speech delivered in rebuttal to President Joe Biden’s State of the Union address.The journalist and author Jonathan Katz has accused Britt of being “fundamentally dishonest” for invoking the case of a woman who had been sex-trafficked at age 12 and raped multiple times to illustrate the supposed failure of the Biden administration’s border control policies.The controversy further intensifies the spotlight on Britt – a rising Republican…