I personally chose to elect Einar, since Rasmus' grudge against...the mole leader, whatever their name was, might lead him to make brash invasion decisions against a largely chill race. Along with sacrificing the farming workforce to do so (not literally but there won't be many working on the farms).
That, and Rasmus is still rather young. While Einar may have wanted to lose, I feel like it would be beneficial for him to carry the burden of Leader for a bit longer, at least until the next election, while Rasmus gains a better understanding of the importance of all roles in the village, as well as what's at stake with every decision...learning precisely why he can't make brash decisions that could come at the cost of people's wellbeing.
Not to mention, he seemed a lot less angry about losing than Jurgen was. I wouldn't put it past him to have persuaded people personally to vote for Rasmus as soon as Einar's priorities fell out of his favour.
Furthermore, it's not like Rasmus can do nothing in the meantime, he just won't have the final call on big decisions. Though I think it's safe to say he's got a significant seat at the table at this point, and is making an effort to get more educated on everything (with him studying after completing all the main story content). Let's just hope Jorgen doesn't try to groom him to share the exact same views further down the line...