Well, start with Northern Ireland. A great deal of credit must to go to Clinton and Blair for making such progress there. (Hundreds of sources will show that). And the unsung heros George Mitchell (former senator), Canadian general De Chastelain and many others. Despite (or because of ) the Troubles,
no president ever went there, not even Kennedy, none until Clinton. Pope JP2 didn’t even go there, although he was very close. Clinton did three trips during his presidency. When an American president flies in, it definitely shows some interest. It was his constant interest, that made the 1998 good friday agreement happen. It would not have happened otherwise. He also visited again after his presidency when they built the Clinton peace center.
news.bbc.co.uk/2/hi/uk_news/northern_ireland/1346866.stm
Of course many people played many roles and they’re still hashing out details, but the changes are real and have lasted years. Now, NI was rated a top tourist spot for 2006-2007 and Belfast one of the top 10 cities to visit. So things have changed greatly.
news.bbc.co.uk/2/hi/business/6037525.stm
The US’s vital role in the process dropped like a stone when W took over. (although he finally made a visit)
As for the legacies, here’s a page where a bunch of “experts” at the Brooking’s Institute are going over that, and judging by the date, it was literally his last day as president and inauguration day for W. Jan 9, 2001: (obviously opinion not fact)
brookings.edu/comm/transcripts/20010109a.htm
It’s not all good, but I would put it side by side with whatever gets said on the first Tuesday of 2009.