False, but it was one of the main ways Islam spread, Islam spread through military conquest, trade, pilgrimage, and missionaries. Arab Muslim forces conquered vast territories and built imperial structures over time. ... The caliphate—a new Islamic political structure—evolved and became more sophisticated during the Umayyad and Abbasid caliphates. Hope this helps :)
Lyndon Johnson defeated Barry Goldwater in 1964 by the largest margin in U.S. history, due in part to the fact that he an implemented many popular policies while serving as president after JFK's assassination.