Woha, that would be a great character developement point!
After watching the prequels and the clone wars series, I wished Jar Jar was either only a minor character or just a goofball for tv ...
But think of the possibilities:
Take or leave the Naboo/Alderaan ideas, combine it with a struggling senator Organa, who is set in position by his people to defend from growing threats (aka "Federation"), to vote or pose Palpatine as the "grand chancellor" and support a "army of the republic" - only to realise, that he made a deal with the devil himself (though not knowing that he is even sinister as that => Sith!) - forming in secret the oppositon, later known as the "rebel alliance" ... end cue: destruction of Alderaan - greek tradegy at full throttle ;-)