Massachusetts September 21, 2019 8:35 am Rep. Kennedy Preps for Senate Run Joseph Kennedy III is expected to formally announce on Saturday that he will challenge incumbent Sen. Ed Markey (D-Mass.) for his seat in Congress in the 2020 election. US & World Videos 2:31 Fallen Billerica Police Sgt. Ian Taylor honored at vigil 2:39 MIT president calls for shutdown of student encampments 0:16 4 people seriously hurt after boat sinks off Cape Cod 2:35 Fallen Billerica police sergeant honored during vigil 2:09 President of MIT calls for shutting down pro-Palestinian encampments