It's far from certain the Republicans held the senate.
Democrats have 47 called + AZ & CO almost guaranteed
In NC with 94% counted, Republicans have a 1.8% lead, but we know the D's have an advantage in the last ballots to count, and the RCP polling average is 47.8%-45.0 D-R.
NC would make it a tie.
In Maine with 74% counted, R Collins is up by 6%, but the Democrat Gideon has been polling consistently ahead of Collins by a large margin. Collins is well liked after winning 2014 with a 34% margin and 2008 with a 23% margin.
A tie would be great for democracy and hopefully make things much less partisan.