In Paraguay, calls for change test Colorado Party's political machine

FILE PHOTO: Presidential pre-candidate for the Partido Colorado party Santiago Pena accompanied by his wife Leticia Ocampo, speaks to the media before casting his vote during the party's primary election at a poll station in Asuncion, Paraguay, December 18, 2022. REUTERS/Cesar Olmedo

Paraguay's ruling Colorado Party - a conservative political machine that has dominated government in Asuncion for some eight decades - could be facing a major challenge at the ballot box next month.

Voters say they want change and are fed up with internal party squabbles and allegations of graft - opening up the door for a broad opposition alliance to win power.