Simple. Every liberal in a conservative state, move to a swing state. You can't expect us people in liberal states to move, you already live under conservative rule anyway, whereas we in liberal states might put our own states into play. (!!!) I know you love your state, but what about your country!
At least those of you in conservative states who are already planning to relocate... consider moving to a swing state, at least for a year or two just to try it out. Don't forget to register to vote.
It's not too late to save your country.
By the way, I know I phrased this as a joke, but I'm also totally serious. Partially totally. And if people wanted to post their serious reasons they would never move from their conservative state, I for one will read each one with interest. Don't think I don't understand why you love your native lands! For one, who doesn't fall in love with the mountains / deserts / river / highlands / neighborhoods of their home area?
Also on the serious note, such a strategy, if ever attempted would accelerate the polarization of the nation. That would be terrible. But we could cry ourselves to sleep with the next 100 years worth of Presidents.
For the very serious: Yes, this is another piece of science fiction for speculative types and clarifying rhetoricians.
And for the justification... hmmm, I wonder how many liberals really are about to move, and for whom this would be a reasonable consideration. How many?