R - 53
D - 47
This presumes that Angus King will caucus with the majority. If he does not, we are looking at a balance of 52-48. Regardless, Republicans now control the Senate.
A slight gain for the Republicans.
Another slight gain for Republicans.
In the more local races
T-1 (exact tie)
There are still 5 chambers where the result is unclear.
In terms of Trifectas; that is, where one party holds the House, Senate, and Governor's position
As usual in US elections, a number of Ballot measures, IE Referendums, were held.
California has adopted a "rainy day fund" similar to that used by Saskatchewan. It's a brilliant idea, frankly, that forces governments to save during the good times to fight deficits during the bad times.
Minimum wages in Arkansas, Nebraska, Illinois, South Dakota, and Alaska were voted an increase.
Oregon, DC, and Alaska have all legalized Marijuana, while Florida refused to legalize even medical marijuana.
Lastly, Tennessee, famous for having no income taxes, voted to ban the state constitutionally from implementing one.
Good websites for more information include Ballotpedia and the NY Times election site.