After decades of conflict between two African countries, President Trump and an adviser said the two sides, with U.S. help, had created an agreement that was now being finalized.President Trump claimed on Wednesday that his administration was close to brokering peace in the war between Rwanda and the Democratic Republic of Congo, two African nations with a long history of conflict. He made the remarks at an Oval Office meeting with South Africa’s president, Cyril Ramaphosa.Mr. Trump said that Massad Boulos, the State Department’s senior adviser for Africa and the father-in-law to Tiffany Trump, had helped settle the war. Mr....