"This partisan lawsuit was nothing short of an attempt to tarnish Gov. Branstad's character and reputation," said Iowa Secretary of Agriculture Mike Naig.
Among Cady's achievements was writing the opinion affirming the right to same-sex marriage in the state.
Iowa will have eight Planned Parenthood clinics left after four shut down on June 30.
Meanwhile, Donald Trump has been selected as "Time" magazine's Person of the Year.