The G.O.P. contenderās campaign tried to take on Donald Trumpās online army. Now it just wants to end the meme wars. ---------------------------------- In early May, as Gov. Ron DeSantis of Florida prepared to run for president, about a dozen right-wing social media influencers gathered at his pollsterās home for cocktails and a poolside buffet. The guests all had large followings or successful podcasts and were already fans of the governor. But Mr. DeSantisās team wanted to turn them into a battalion of on-message surrogates who could tangle with Donald J. Trump and his supporters online. For some, however, the gathering...