Indeed, after Mr. Trump sent forces to seize the Venezuelan leader Nicolás Maduro, the pope declared that Venezuela’s “sovereignty” must be guaranteed along with “the rule of law enshrined in its Constitution.” Leo had already urged the United States not to follow through on threats against Venezuela and criticized the administration’s military buildup in the Caribbean. He also repeatedly lamented the treatment of immigrants by U.S. authorities and called on American clergy members to be vocal and active on the issue, which they have been.