Early life and education
Welker is the daughter of Harvey and Julie Welker. Her father is an engineer, her mother a real estate agent. Welker's father is white and her mother is black. She graduated from Germantown Friends School in Philadelphia in 1994 and Harvard College with a Bachelor of Arts in 1998. At Harvard, she majored in history and graduated with honors.
Welker has worked at ABC affiliates WLNE-TV in Providence, Rhode Island, and KRCR-TV in Redding/Chico, California, and joined NBC in 2005 at affiliate WCAU in Philadelphia, where she was a reporter and weekend anchor. She then joined NBC News in 2010 as a correspondent based at the NBC News West Coast Headquarters in Burbank, California. She became an NBC White House correspondent in December 2011. Welker regularly represents MSNBC at the daily White House press briefings as well as reports live for various programs on the channel. She also fills in for Lester Holt on NBC Nightly News and Katy Tur on MSNBC.