Republican officials in multiple states are on the verge of canceling their 2020 presidential primary elections in a show of support for President Donald Trump, even as some GOP candidates plan to challenge him. Party leaders in South Carolina, Nevada and Arizona have all expressed support for nixing their presidential primaries, and are expected to make it official over the coming weeks. Leaders of the South Carolina and Nevada Republican parties will each meet Saturday to reach a decision, while the Arizona GOP Executive Committee will discuss its decision at a Sept. 14 meeting. Kansas Republicans are also considering nixing...