Even the Texas attorney tasked with representing the Lone Star State in federal court is having a difficult time defending Senate Bill 4 — his state’s hardline new immigration law. CNN reported that Texas Solicitor General Aaron Nielson, who is tasked with defending SB 4 before the 5th Circuit US Court of Appeals this week, admitted that some of the law’s stricter provisions may run afoul of federal immigration law. Nielson said SB 4 was designed to go “up to the line” of what was legal at the state level. “Now, to be fair, maybe Texas went too far,” Nielson said. READ MORE: ‘Grave irreparable…