Independent presidential candidate Robert F. Kennedy Jr. is suspending his campaign. Kennedy, an environmental attorney and talk radio host who hails from the famous Kennedy political family, formally announced his intentions in a speech on Friday. He is best known for promoting a variety of conspiracy theories, particularly on vaccination and the COVID pandemic. Despite hailing from a family that has produced famous Democratic Party leaders, he has particularly appealed to some activists on the right. Polls have offered mixed signals on whether Trump or Vice President Kamala Harris would bene…