Not so - Padme was the one to call the vote of no confidence in Chancellor Valorum, the previous chancellor (played by Terence Stamp), which paved the way for Palpatine in the first place. Jar Jar would probably have given out emergency powers if Valorum had been chancellor anyway - if it wasn't for Padme Valoruym would have used the clones for good and probably saved the Republic. Padme was the main tool - you even see Sidious constantly influencing her with the Force in the Phantom Menace senate scene, as below in Figure 1:
Figure 1 - Sidious influencing Padme
Really it was Palpatine all along - he engineered the Separatist crisis to get the Republic to nominate him to be Supreme Chancellor and then he could cause as much trouble as possible. The Separatists were all tools as well - once Anakin had become Darth Vader and Palpatine had executed Order 66, the Separatists were no longer needed.
The reason Jar Jar gave the emergency powers was because he was under pressure - Padme gave him the responsibility of being senator for Naboo after she resigned (not the wisest move ever), and when Palpatine's aide (the blue chap in Figure 2) says "If only Senator Amidala were here", that pressures Jar Jar into trying to keep up the good work that Padme did, as in Figure 3.
Figure 2: "If only...Senator Amidala were here." - Palpatine's aide (left), probably being influenced by Palpatine as well (right)
Figure 3 - Poor old Jar Jar feeling as though he must continue Padme's work
If anything, Palpatine was taking advantage of Jar Jar's friendly nature and lack of intelligence to get him to give him the power he needed. Poor old Jar Jar got the blame for everything when in fact there was nothing that could be done to stop Palpatine once he had become Supreme Chancellor - once that had happened, it was all over already really. So leave off the hate on Jar Jar.
Nevertheless, I do still believe Captain Tarpals is a better representative of the Gungans - he has a heroic last stand against General Grievous, as shown below:
While he does sadly die in the end, it took real courage to fight a cyborg with 4 arms - only Obi-Wan also showed such bravery. Captain Tarpals will always be a legend in my book.