Andy Kim will officially begin his term as U.S. senator on Monday, starting three weeks early. New Jersey Gov. Phil Murphy appointed Kim to the Senate on Sunday, following the certification of his election victory in November.

New Jersey's newest U.S. Senator was formally sworn in Monday afternoon. Sen. Andy Kim won the seat previously held by Bob Menendez during the election last month and will finish the last two weeks of Menendez’s term in accordance with vacancy laws.

Fellow Democrat George Helmy just left the seat after temporarily holding it in the wake of Robert Menendez's resignation.

Democrat Andy Kim was sworn in Monday as New Jersey's newest U.S. senator. He vowed to fight for Americans' dreams.

Sen.-elect Andy Kim was officially appointed by Gov. Phil Murphy on Sunday, and interim Sen. George Helmy has resigned.

State Department official. Obama White House adviser. Three-term congressman. Dad. At long last, Andy Kim can add a new title to his resume: U.S. Senator.

Kim is the first Asian-American to win that post in New Jersey, and will be the first Korean-American to serve in the Senate.

Andy Kim was sworn in as New Jersey’s next U.S. senator, replacing George Helmy, who was appointed to hold the seat after Bob Menendez’s conviction and resignation. Kim gets a headstart over other incoming senators,

Andy Kim was sworn in as New Jersey's newest senator Monday. He said it marks the beginning of "a new era of politics in New Jersey."