Long term drift to the Democrats?

[English]

Would it be a fair assumption to make to say that immigration over the long term will push the US further and further to the Democrats? Has this already happened in CA where the GOP are now effectively locked out in presidential elections?

[English]

I agree, there is no similarity whatsoever between US and UK voting preference. In the UK 80% of people's voting preference is based on tax, fiscal policy and the economy. Even socially conservative people will vote Labour if it suits their pocket. Likewise I know many social liberals who vote Tory, simply because it's in their economic interest to do so. This is changing to some extent, but it's still largely the case 'Poor Labour', 'Rich Tory'. Social issues really don't matter a jot at the ballot box in Britain. In the US things like gay rights and abortion are much more contentious. If people in the US voted as Britons do, Connecticut would be the safest GOP state and Mississippi would be a Democrat landslide (80%+ Democrat).

[English]

If people in the US voted as Britons do, Connecticut would be the safest GOP state and Mississippi would be a Democrat landslide (80%+ Democrat).

You're assuming that poorer people will believe the Democrats when they claim to be "on their side".  It doesn't ring true when the US Senate is full of liberal Democrats that are millionaires.
One of my state's Senators, Dayton, is from an extrememly wealthy family.  How can he relate to a guy trying to start his own business?

No question Mississippi would be staunch Democrat if US voters voted the same way as British Voters. It's the poorest state in the US. The poorest UK areas tend to vote +70% Labour.
On the other hand a place like Connecticut in the UK would be iron-clad Tory, probably a bit like Surrey.

[English]

It's swings and roundabouts. I agree the UK has shifted to the right (economically) in recent years. However that's simply because the economy is strong. If unemployment rises and things start looking bleak, it will all move leftward. Socially, Britain has moved monumentally to the left since the 80's. Social conservatism in the UK is dead, just like Socialist Fiscal Policy.