I'm a little conflicted on this. Clearly if we leave security to political parties, for many reasons we can expect poor security in IT, which leaves our very democracy vulnerable.
On the other hand, imagine the government mandating "if you run for office, you and everyone in your campaign must use this email for all communications, and if you communicate electronically outside of these approved methods we'll come down on you". The number of ways that could be misused is mind-boggling. Even if it isn't used to sniff on the communications of the opposition, it could simply be raised to higher and higher levels of complexity (and perhaps $$ cost) until new political parties (or insurgencies within a party) cannot afford to compete, because the legal requirements for IT are too stringent.