Key Republicans voiced strong support Sunday for special counsel Robert Mueller’s handling of the investigation into Russian meddling in the 2016 U.S. presidential election, but split on whether Congress needs to approve legislation to block President Donald Trump from firing Mueller. Senators Lindsey Graham of South Carolina and Susan Collins of Maine, breaking with some of their Republican colleagues in Congress, stated in separate Sunday news shows that they support legislation, mostly favored by Democratic lawmakers, to require a judicial review if Trump were to attempt to dismiss Mueller. Two prominent Republican lawmakers in the House of Representatives — Kevin McCarthy of California and Trey Gowdy of South Carolina — both said they approve of Mueller’s performance in the ongoing criminal investigation. But McCarthy said he sees no need to enact a law to prevent Mueller, a former director of the Federal Bureau of Investigation. Mueller’s fate is at the …