Cameron has said from the start that he wants to be part of the EU, but he wants to distance us from it so that the EU has less political influence and rather just an economic relationship. He's not tried in any way to hide this view, so I don't know what you mean by that.
In terms of the lisbon treaty, I'm sure we would have had a referendum on it, but yet again thanks to the labour party they've accelerated things so that it is not longer possible to have a referendum on it. As far as I know, with the validation of the presidential position of the EU the lisbon treaty is in effect as far as they're concerned. This means Cameron cannot do anything about this matter. The only options open to Cameron and us on the EU now are these:
- Either we continue our membership of the EU, and so Cameron has promises to give a referendum on all major topics on the EU from the election onwards, should he indeed become PM.
- Or, we revoke our membership of the EU, which can be done and in my opinion wouldn't put us at much of a loss considering the gains following this (contrary to what scaremongering pro-eu people would have you believe).
They have also proposed new immigration processes if you take a look at their website, which will be much much better than the almost non existent one labour have employed. This would mean that should the EU expand we wouldn't get that influx of immigration. Also in my opinion I'm sure the tories will do a better job of kicking out those that do not deserve to be here and tracking down illegals that labour have no idea of their whereabouts.