A big shakeup is expected to happen in the presidential campaign on Friday — but there’s some uncertainty over how much it could impact the race. Robert F. Kennedy Jr., the environmental lawyer, talk show host, and conspiracy theorist who is descended from the Democratic Party dynasty of the Kennedy family, reportedly plans to end his presidential campaign at the end of the week and is considering endorsing former President Donald Trump. According to analyst Philip Bump of The Washington Post, the result of such a move isn’t easy to predict. Want more breaking political news? Click for the lat…