Federal law enforcement officials have charged a Pakistani national who allegedly plotted to assassinate a top U.S. politician or official, said to be former President Donald Trump. Asif Merchant, 46, was arrested while in the process of attempting a murder-for-hire scheme, in which he paid undercover U.S. agents to arrange meetings with potential killers, according to a criminal complaint unsealed Tuesday in New York. Merchant, who has purported tied to Iran, travelled to New York City to meet...