Prime Minister Shinzo Abe explained his decision to resign in separate calls with U.S. President Donald Trump and Russian President Vladimir Putin on Monday, while also touching on a number of issues involving the countries that remain unresolved.During his 30-minute phone talks with Trump, Abe thanked him for helping to make the Japan-U.S. relationship "the strongest it has ever been," the Japanese government said.It was Abe's first phone call with a foreign leader since he abruptly announced his resignation on Friday, citing a relapse of ulcerative colitis, an intestinal disease that can …READ FULL ARTICLE