Lisa Montgomery, the only woman on federal death row, was set to be put to death early Wednesday morning after the Supreme Court denied three rulings by federal courts ordering a stay of execution. Montgomery, 52, got the death penalty in 2008 for killing a pregnant woman four years earlier and stealing her fetus. The baby survived. Three federal courts ordered a stay of Montgomery’s execution, but the nation’s highest court overturned the rulings, with the final decision coming at about midnight. A federal district court ruled Monday that Montgomery should undergo a mental health evaluation b…