2017 In Review, at Home and Abroad

ABC's 'This Week' co-anchor Martha Raddatz looks back on the wild year in politics and hot spots on the world stage.
4:04 | 12/31/17

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Transcript for 2017 In Review, at Home and Abroad
An incredible roller coaster of a year. 2017. Just hours from becoming history. The clock has already struck midnight in Sydney, Australia. The streets of London are preparing. Here in the U.S., more than 1 million people are expected to gather in a frigid times square for the ball drop. We'll have more on the security preparations for New York and much of the country later in the program. We begin by reflecting on the past year. There will be celebrations across the country. In this divided nation, what we celebrate will be decidedly different. Many will cheer being one year closer to tend of president trump's term. Others looking forward to another year of trump's unique no holds barred style. Not much common ground among Americans today. No one could have majd what a wild year it's been. A president. Can you believe it? Right? Reporter: The it's been a year like no other. It's a whole different attitude. A whole different way. ??? Reporter: Things got off to a rough start. This was the largest audience to ever witness an inauguration, period. Reporter: Despite multiple white house staff shakeups. Everyone on the president's team pig chured here now gone except for the respect. Reporter: Trump's influence on America is undeniable. His supreme court pick sitting on the bench. And I got T I done in the first 100 days. That's even nice. Reporter: The biggest tack overhaul in more than three decades. That's your bill. Reporter: And major raeg lagss reversed in a crusade trump has vowed to carry on. He waded into culture war. Get that son of a Off the field right now off the field. He's fired. He's fired! Reporter: Often fanning the flames of division. I think there's blame on both sides. I have a running war with the media. They are among the most dishonest human beings on ea Reporter: He fell short on his major campaign promise to repeal and replace Obamacare. We're not getting the job done. And I'm not going to blame myself, I'll be honest. Reporter: An agenda often side tracked by questions of Russian influence and the shadow of the moouler investigation. How many times do I have to answer this question? Russia is a ruse. I have nothing to do with it. I'm not. And I don't want to be the president of the world. I'm the president of the united States. An from now on, it's going to be America first. Reporter: But the president will carry with him a number of global dmajs 2018. Chief among them, North Korea. They'll be met with fire and fury. Reporter: Trump's tough talk backed up last week by new U.N. Sanctions. A move called an act of war by North Korea. Another test, China. Will he continue to treat them as an ally to prevent war with North Korea or an adversary on trade? On Iran, trump must beside on whether to make good with his threat to end the nuclear deal. And a Russian threat looms. Russia will continue to target the 2018 and 2020 U.S. Elections with online information warfare. While trump can claim some success in the fight against the islamic state -- We have dealt ISIS one devastating defeat after another. Reporter: What's left of the insurgent force is pushing into parts of Syria and outside the Middle East. And of course ISIS continues to inspire those lone wolfs here at home and around the globe.

This transcript has been automatically generated and may not be 100% accurate.

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