Independent presidential candidate Robert F. Kennedy, Jr. has selected a running mate and plans to announce that person in the next two weeks, according to someone familiar with the process.

Kennedy, the nephew of President John F. Kennedy and son of a former U.S. attorney general, left the Democratic Party last year in protest of its nominating process and launched a third-party bid. He has cast a broad net since then, speaking with former politicians, a famous athlete, a motivational speaker and several political activists as he seeks to find a partner for the campaign trail.