Robert F. Kennedy Jr. is expected to end his troubled independent presidential campaign this week, according to three people briefed on his plans, and is in talks to throw his support behind former U.S. President Donald Trump.

Kennedy’s campaign said Wednesday that he intended to address his "path forward” in a speech from Phoenix on Friday, the same day that Trump is expected to hold a rally in nearby Glendale, Arizona.

Three of the people briefed on Kennedy’s plans emphasized that nothing was final and that the iconoclastic Kennedy could still change his mind, but said that plans were in the works for him to appear alongside Trump on Friday. Some people close to Kennedy were still arguing against an endorsement, according to two of the people.