Still two countries, Georgie!

Would it be better to believe the Unelected One was simply under a misapprehension, or just generally stupid? Here are his exact words, as heard in news broadcasts, and as printed in the NYTimes today:

"Today, I'm pleased to announce that the United States and Russia has [sic] agreed to a treaty which will substantially reduce our nuclear arsenals to the agreed-upon range of 1700 to 2200 warheads."