Former President Donald Trump, for example, has been asking for a “ battle plan” to “attack Mexico,” specifically targeting drug cartel strongholds in the country. Three recent articles - in Rolling Stone, Politico, and Semafor - traced the rise of the proposal from obscurity to the party’s highest levels, finding ample evidence of the idea’s popularity in the GOP ranks. One of the hottest new ideas in Republican politics is, apparently, launching a war in Mexico.