Complex sentence: White House Chief of Staff Bob Alexander (Langella) and Communications Director Alan Reed (Dunn) convince Dave to continue impersonating the President, claiming that Vice President Gary Nance (Kingsley) is mentally unbalanced.
Split into simpler sentences: White House Chief of Staff Bob Alexander (Langella) and Communications Director Alan Reed (Dunn) convince Dave to continue impersonating the President. They tell him that Vice President Gary Nance (Kingsley) is mentally unbalanced.