Complex sentence: Boudria was known within the Liberal caucus as a leading Jean Chrétien loyalist, and lost his cabinet position in December 2003 when Paul Martin replaced Chrétien as Liberal leader and prime minister.
Split into simpler sentences: Boudria was known within the Liberal caucus as a leading Chrétien loyalist. He lost his cabinet position in December 2003 when Paul Martin replaced Chrétien as Liberal leader and prime minister.