Tony Blair, the former British prime minister, has been tapped by President Trump to play a key role in a new plan to end the war in Gaza. Blair's involvement in the region dates back to his support for the Iraq war 22 years ago, and he now has the opportunity to redefine his legacy. Despite his controversial past, Blair's experience in conflict resolution, such as negotiating the Good Friday Agreement in Northern Ireland, could be valuable in brokering a settlement between Israel and Hamas.