Complex sentence: Many elected officials and appointees (mayors, judges, governors, members of Congress, U.S. Presidents) have benefited from the CBTU's commitment to political action, and CBTU was an early supporter of the Congressional Black Caucus.
Split into simpler sentences: Many elected officials and appointees (mayors, judges, governors, members of Congress, U.S. Presidents) have benefited from the CBTU's commitment to political action. The Coalition was an early supporter of the Congressional Black Caucus.