Anchorage may well be becoming more "moderate" than "conservative".  But I'm not sure it's reasonable to use as proof of that the votes received by President Obama, running against Mitt Romney who was not well liked, to the votes received by Mondale, who was so soundly beaten across the country as to be embarrassing.  I think, with the exception of those on the far right and far left, that you're correct to say that people's political leanings depend more on the specific issue and the specific person.