"If all the people who liked them voted for them you could change politics overnight and we could have a proper three-party system."
Now, correct me if I'm wrong, but isn't an election the time of the political cycle where people who do actually like parties go and vote for them? If someone is motivated enough to support or even like a political party to a reasonable extent, you can bet money they'll be voting for them when a general election rolls round. Could it be that young Mr. Radcliffe believes the Lib Dems to be more popular than they actually are? It certainly fits in with the acting profession's political mentality of thinking that something must be important for us simple common folk because it's important for them - the great, lofty thespians that they are.