Hi! I am also admitted to IR/POLS and received the decision about scholarships. But I am admitted at the first round of the applications. Maybe thats why you didn't get the decision yet.
I asked them when they will announce the decisions about scholarships and they told me that we will learn it by the end of the week. So I think we don't need to check our e-mails today. They will probably announce the results tomorrow.
I have applied to the early round and received the letter on december. I am sure they will inform you too till the end of this week. I sent an e-mail to the school on monday but they didn't reply. They are probably busy with your applications and getting redy to announce the results!