WILMINGTON, Del. (AP) — President-elect Joe Biden is criticizing President Donald Trump’s unprecedented attempt to block the peaceful transition of power at the White House, saying it has hindered the flow of information about programs to fast-track a coronavirus vaccine.

Biden told the National Governors Association's leadership group on Thursday that his incoming team “hasn't been able to get everything we need” from the Trump administration.

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Biden says Trump is likely to go down as the nation’s most irresponsible president — not just for his four years in office but also for his refusal to concede the election and cooperate in the transition.