imperials because of the empire's influence or dunmer because they got owned by the argonians

All the reports made by people who have played the game, say Orcs are the second most numerous race in Skyrim.

Dunmer, unless they have already started to take back Morrowind/rebuild their land.

Lord of Souls still predates Skyrim by over a century. I would think it might be a toss up between Dunmer and orcs, with a heavy Orc regugee population in the West near the borders of High Rock, and a massively expanded Dark Elven population in the East, along the borders of Morrowind.

I'm saying Imperial due to the whole Stormcloaks thing well, who knows.

I voted Imperials because isn't their main location below Skyrim so it seems like it would be easy to go up but then again so would it be to go left or right..

Even if Argonians aren't the second highest populace, I am going to attempt to mate their way to the top.

Population; highest to lowest

Nord
Orc
Dunmer=Imperial
Breton=High Elf
Redguard=Bosmer
Khajiit=Argonian

a scalie! get the torches!