At one time I was interested (and had it suggested to me, back when I was still active with the Liberal Party here in Canada), but nowadays, forget it.
In spite of the "perks" we occasionally hear about, it's not a particularly desirable job. The hours are long, the amount of crud you must take from your co-workers and the public alike is unbearable, and you must be willing to not just sacrifice your own privacy, but that of your friends and family as well.
Also, under Canada's system of party discipline, your freedom of speech and thought is extremely limited. Elected representatives who vote against their party can be expelled from caucus; and the parties often give the party leader the right to overturn a candidate's nomination.
I'd much sooner be a pundit.