The number of bills passed by Congress decreased under G. H. W. Bush. Answer A: The number of bills passed by Congress decreased under G. H. W. Bush. A The number of bills passed by Congress gradually increased under Nixon. Answer B: The number of bills passed by Congress gradually increased under Nixon. B The number of presidential vetoes under Johnson decreased over time. Answer C: The number of presidential vetoes under Johnson decreased over time. C The number of presidential vetoes under Eisenhower increased over time.