At the end of 1990 he publicly criticized the direction of the PSC in a public letter and , after a PSC faction succeeded in appointing Jaime Nebot as the its presidential candidate and national director during the 1991 internal elections ( despite opinion polls reportedly giving him advantage over Nebot ) , Durán Ballén and his supporters left the party to form the more right-wing Republican Union Party .
After León Febres Cordero 's faction inside the PSC succeeded in appointing Jaime Nebot as the party 's presidential candidate in 1992 , Durán Ballén and his supporters left the party to form the more right-wing Republican Union Party .