By Kristen Wong The Kansas City Chiefs are starting to understand the feeling of losing all too well. Chiefs stars Travis Kelce and Patrick Mahomes had on disappointed faces after Monday’s 20—17 loss to the Las Vegas Raiders, and so did their significant others. Taylor Swift and Brittany Mahomes were seen sharing a moment together as Kansas City suffered arguably its ugliest loss this season. The pop star, who proudly flaunted a Santa hat with a red embroidered No. 87 on it, consoled a shocked Brittany Mahomes and wrapped an arm around her while looking into the distance. Swift appeared to say…