Complex sentence: Within a year of the party's formation, Johnson, Carey and others left the BDM citing methodological differences with Stuart as the primary reason for their departure.Johnson and Carey ultimately joined another political party the Coalition for Democratic Reform (CDR).
Split into simpler sentences: Within a year of the party's formation, Johnson, Carey and others left the BDM citing methodological differences with Stuart as the primary reason for their departure. Soon after their departure, Johnson and Carey joined another political party the Coalition for Democratic Reform (CDR).