(CNN)-The day after the Benghazi terror attack, a staffer for Arizona Sen. John McCain emailed Secretary of State Hillary Clinton's office to convey praise for her remarks to State Department employees after the attack. Her statement to employees about the tragedy was "wonderful, strong and moving," said the McCain staffer, who asked Clinton's office to convey the senator's appreciation of the remarks. Ultimately, McCain turned into a fierce critic of Clinton over the attack. And Clinton's handling of Benghazi has been scrutinized and has cast a shadow over her tenure leading the State Department. But the friendly exchange between their...