Complex sentence: Elected in 2013 in a crowded race, Cumbo did not face a challenge from a Republican candidate and succeeded Letitia James; she was handpicked to run by Brooklyn Congressman Hakeem Jeffries.
Split into simpler sentences: Elected in 2013, Cumbo did not face a challenge from a Republican candidate. Cumbo succeeds Letitia James; she was handpicked to run by Brooklyn Congressman Hakeem Jeffries.