Robert Hur faces questions from lawmakers over Biden classified files report

US lawmakers will grill special counsel Robert Hur on Tuesday, weeks after his report into Joe Biden's handling of classified documents shook Washington.

The report found Mr Biden "wilfully" retained troves of files, but declined to charge him with a crime.

Mr Hur said a jury would view the president as a "well meaning, elderly man" with a "poor memory", in comments that enraged the White House.

Voter concerns over Mr Biden's age mean Republicans will focus on the remarks.

The party has been stoking claims for months that the 81-year-old is not mentally fit to serve a second term in the White House, with polling suggesting that a significant proportion of voters are also worried about Mr Biden's mental acuity.