WASHINGTON (AP) — President Donald Trump's oldest son is scheduled to make his first appearance on Capitol Hill Thursday as part of a Senate investigation into Russian meddling in the presidential election and a meeting he had with Russians during his father's campaign last year. Donald Trump Jr. will be interviewed by staff on the Senate Judiciary Committee, which is one of three congressional committees investigating the meddling and possible Russian links to his Trump's 2016 presidential campaign. Trump Jr.