By David Brunnstrom WASHINGTON (Reuters) – After U.S. President Joe Biden’s 2020 election victory, his future policy chief for the Indo-Pacific region said the new administration would have to decide quickly its approach to North Korea and its nuclear and missile programs. Delay during the Obama administration saw “provocative” North Korean steps “that basically headed off any possibility of engagement,” Kurt Campbell said. High-profile summits between former President Donald Trump and North Korean leader Kim Jong Un produced little. Yet Biden left North Korea entirely out of his maiden foreig…