evidence: What to know about Kristen Welker, the NBC reporter replacing Chuck Todd [...] NBC’s major Sunday politics show, "Meet the Press," is getting a new look this fall. Chuck Todd, the show’s host for the past nine years, is stepping into a new role as the network’s chief political analyst, and Kristen Welker, NBC’s chief White House correspondent, will take over the role in September. Here’s what to know about the show’s new host: [...] She joined NBC News in 2010, and began covering the White House for the network at the end of 2011.