Tsongas was seated in the House almost immediately after her election when her vote was needed by the Democrats, despite no Massachusetts election certification.
Al Franken had to wait 6 months because his opponent was a sore loser.
Franken would have done the same thing.
Even if he would have, which there isn't evidence for, he wouldn't have been such a hypocrite to use the same Bush 2000 lawyers who argued that the election needed to end as soon as possible. Bush had 39 days after the election was decided. Al Franken had negative 6 months.