So why has the politcal system in Washington proclaiming Biden as the President elect
The official "political system" HAS NOT DECLARED A WINNER! By that, I mean the "system" as defined by the Constitution.
On December 14 ,each State government is to appoint its Electors (to the College) based on their certified election results. (I believe most States much certify results by Dec 8).
On January 6, the newly elected members of Congress (both House and Senate) meet in a joint session to "count" the electoral votes and declare the "winner".
At this point in time, the news media have PROJECTED THEIR OPINION as to who is the APPARENT President-Elect. Ask Thomas Dewey what that's worth........