"If your attitude is wrong, if your intention is to use healthcare to destroy the other party, or to destroy the presidency of Barack Obama, then it's very unlikely you're going to find much consensus from people who want to use healthcare," Hagel said earlier this month in a speech at the University of Michigan, video of which was only made available recently.

"As some Republican senators have said publicly - that if we kill Obama on this, and we destroy this, and we defeat this, that will drive a stake through his political heart on this administration," the former senator, who retired at the end of his term in January, added. "I just find that about as irresponsible of a thing as I can think of."