Complex sentence: After Roosevelt's election, Berle became a key advisor in the successful New York mayoral election campaign of reformer Fiorello LaGuardia, and from 1934 to 1938 he managed the city's fiscal affairs as its last Chamberlain.
Split into simpler sentences: After Roosevelt's election, Berle became a key advisor in the successful New York mayoral election campaign of reformer Fiorello LaGuardia. From 1934 to 1938 Berle managed the city's fiscal affairs as its last Chamberlain.