The top-ranking Republican on the Senate Armed Services Committee said President Barack Obama could possibly be impeached over what happened in Benghazi. Sen. James Inhofe (R-Okla.) said in a radio interview Thursday that “of all the great cover-ups in history” — including the Pentagon papers, Iran-Contra and Watergate — Benghazi “is going to go down as most serious, most egregious cover-up in American history.” “We may be starting to use the I-word before too long,” Inhofe said on the Las Vegas-based “Rusty Humphries Show.” “The I-word meaning impeachment?” Humphries asked. “Yeah,” Inhofe confirmed. When Humphries questioned the likelihood of impeachment,...