A farewell message from Defense Secretary Jim Mattis, who departs his office this evening. pic.twitter.com/Wiix70SBC2

— Dan Lamothe (@DanLamothe) December 31, 2018

MATTIS FAREWELL: DefSec Jim Mattis kept a letter from Pres. Lincoln to LtGen. Grant in his office to remind himself to ignore the turmoil of Washington. I asked him to sign a copy for me last week. Today he cited the same letter in his farewell message to DoD employees. 1/2 pic.twitter.com/CHhhK8vEPV

— Jamie McIntyre (@jamiejmcintyre) December 31, 2018

Mattis retires today, over policy differences with the president. No ceremony. No honors. For comparison, here's how President Obama said farewell to Chuck Hagel (a Republican) who also left over policy differences. https://t.co/fyD6Rt6rV1

— Kevin Baron (@DefenseBaron) December 31, 2018