ATLANTA — The 2020 election unfolded smoothly across the country and without any widespread irregularities, according to state officials and election experts, a stark contrast to the baseless claims of fraud being leveled by President Donald Trump following his defeat. Election experts said the large increase in advance voting — 107 million people voting early in person and by mail — helped take pressure off Election Day operations. There were also no incidents of violence at the polls or voter intimidation. “The 2020 …