Alec Baldwin returned to Saturday Night Live as Donald Trump to mock the president-elect's retweeting practices, and the Donald himself was apparently watching, because as Zach Seemayer writes at ETonline, "ignoring the existence of irony all together, he immediately jumped on Twitter to slam SNL for mocking his propensity for over-using the social networking platform." Tweeted Trump: "Just tried watching Saturday Night Live - unwatchable! Totally biased, not funny and the Baldwin impersonation just can't get any worse. Sad." Responded Baldwin shortly after: "...@realDonaldTrump Release your tax returns and I'll stop. Ha." Catch the Cold Open in the gallery. (More Saturday Night Live stories.)