Is there a time limit to campaign levels?

So far I've always managed to complete the objectives for the campaign levels, and I know there are various conditions that trigger a loss (losing an election, coup, having your palace destroyed). But what happens if I just keep playing a level without either of these things happening? Do I eventually run out of time to complete the level and have to start over from the beginning?

Solution 1:

There is no time limit. This guy seems to agree with my own testing.

Solution 2:

I don't believe that the campaigns have time limits, since I've played one to 2013 before, which is past the limit for any sandbox game.