Gen. James Mattis

Jim Mattis, who resigned as Trump's defense secretary nearly a year and a half ago, accuses the president of dividing the nation and warns against "militarizing our response" to protests.

Both Republican and Democratic members of Congress praised the retired Marine Corps general and expressed concern over the direction of Trump's military and foreign policy once Mattis is gone.

Retired U.S. Marine Gen. James Mattis, who was part of the military leadership based at Tampa’s MacDill Air Force Base, is being considered for a cabinet…