President Donald Trump’s efforts to overhaul U.S. voting systems have been stymied by court orders finding that his tactics were legally flawed. During his second term, Trump issued two executive orders on election integrity. Among other provisions, they required proof of citizenship and asked multiple federal agencies to compile a list of eligible voters in each state. Some courts blocked his actions, saying that the requirements intruded on Americans’ privacy rights and could exclude eligible voters. At least one court ruled in Trump’s favor, however, creating a conflict between two judges. Here’s what to know about Trump’s efforts and the legal battles surrounding them....