This is what's gonna happen. In 2025ish the Democratic president will withdraw funding from Israel. Without the numbers and aid that the Arabs have, Israel will fall and be replaced by Palestine. In the 2030's the political party cycle will have the Republicans back in power, and we'll start expanding. We'll start being referred to in international conversation as the "American Empire". The PS40 comes out, and Now Hit Music 972 provides us with bland techno. McDonald's is subject to so many boycotts that it eventually files bankrupcy around 2037. The Republicans retake control of Maine, and the largely Democratic states ban transfats. In the 2050's the EU drafts a bill to unite under one banner, and it succeeds narrowly. Los Angeles is a big ghetto now, and the only states with a white majority are the northern ones. In the 2060's the US loses the Arab conflict and has Saudi Arabia as it's only semi-ally. The US also withdraws from the UN at this time, influencing Britain too, and the EU eventually does too. The UN falls because of no big nation's support. By 2090 crime is a huge problem and the US slips toward dictatorship. The Democrats lose control because of more and more business regulations, and the US becomes a one party state in 2095. 2100 brings in the new dictator of the US. 2102, Maine finally loses it's white majority (which is going to be the last state to do so in today's projections) and the Hispanics are in charge. Canada is annexed by the US, and Mexico is in 2105. By 2107 the US has control over the Carribean, and, if you want to go farther...
In 2110 Europe becomes the third superpower, along with China and the US. It aligns with neither side, and the Arabs unite in 2115. By 2125 Europe and the US unite, and China unites with the Arabs to balance power. In 2150, nuclear war breaks out. Due to smart leaders, only about 15 nuclear weapons are exchanged, but the climate is affected because of it, and the slightly blocked out Sun stops global warming completely, which was slowed by Democratic controlled America in the 2030s.
In 2250, the world finds an extraterrestrial civilization on a moon orbiting Mu Arae B.