The US Senate girded Friday for a critical, too- close-to-call vote on moving ahead with the nomination of Brett Kavanaugh to the Supreme Court, as Republicans brushed aside complaints by Democrats that a new FBI probe of sexual assault allegations against him was rushed and incomplete.

A final vote could come Saturday on President Donald Trump's embattled candidate, who if approved would seal a conservative majority on the nine-seat court for decades. It is not a done deal, however. Republicans hold a 51-49 majority in the chamber and three of their members are seen as undecided on Kavanaugh, as a confirmation process that has gripped the city and the nation and aggravated already deep political divisions reaches its climax with just weeks to go before mid-term elections.