In this Race for the 1st conversation, The Exchange on Monday interviews Mark MacKenzie , a Democrat running in the closely watched race for New Hampshire's 1st Congressional District. MacKenzie lives in Manchester, New Hampshire, where he serves as a Representative, and he also served as a firefighter for the city for many years. He is a former President of the New Hampshire AFL-CIO. Our Race for the First conversations will focus on the issues at the forefront in the CD1 race, including