In general, they should stick to the ideas they espoused when trying to get elected: but prioritise them and be willing to trade compromise on one ideal in order to advance another.
Compromise isn't a virtue in itself, it's the absolutely necessary lubricant that all politics (democratic or otherwise) depends upon: except in the [i]rare [/i]case where a huge majority of the population agrees upon a topic.
This is a bit a false paradigm. People, including politicians, should stick to there deeply held beliefs. That doesn't mean doing so in dogmatic ways that preclude any possibility of changing those beliefs. And compromise can happen within the confines of competing beliefs.
@NoSugar Then you haven't seen many of my comments. But you're right. I thought there was a chance for an intelligent discussion here. I was wrong, I apologize for that.
Now here's a picture of a monkey throwing (probably) poo. Have a good one.