A federal inmate sentenced to 15 years in prison for scamming a Native American tribal entity out of tens of millions of dollars appears to be the new star witness in House Republicans’ quest to impeach President Joe Biden, official documents show. Reps. James Comer (R-KY), Jim Jordan (R-OH) and Andy Biggs (R-AZ) Tuesday sent out two more angry letters — this time to Manhattan-based assistant U.S. Attorney Negar Tekeei and Federal Bureau of Prisons Director Collette Peters — demanding information about why Jason Galanis’ 2023 pleas for early release were denied. “The Committees held a transcri…