Complex sentence: Scott and Marjorie Cowen were credited by Mary Matalin as convincing Matalin that her husband James Carville was right about the merits of moving their family to New Orleans; after having breakfast with the Cowens, Matalin went shopping for a house.
Split into simpler sentences: Scott and Marjorie Cowen were credited by Mary Matalin for swaying Matalin to relocate to New Orleans and that her husband James Carville was right about the merits of moving their family to New Orleans. After having breakfast with the Cowens, Matalin went shopping for a house.