Mitch McConnell should be very worried about the Senate. Here's why

It's almost hard to believe: Joe Biden is on the verge of turning Georgia blue, making him the first Democratic candidate for president to do so since 1992. It caps a remarkable transformation for a fast-diversifying state that had long seemed on the brink of flipping but had never quite gotten there—until now.
It also has enormous implications for the future of our country. Biden's impending Peach State victory is icing on his electoral cake, of course, since he's already locked down the 270 electoral votes that have made him president-elect. (And how was your Saturday? Mine was pretty swell!) The most important thing it signals, rather, is that Democrats can win the two all-important runoffs for the Senate that are slated for Jan. 5.
The math is simple: Republicans currently hold or lead in races for 50 Senate seats while Democrats have secured 48 seats. If Democrats Jon Ossoff and Raphael Warnock win their respective contests in January, that'll make for a 50-50 split, with ties broken by (say it with me now!) Vice President-elect Kamala Harris.
These will both be very difficult races, no doubt about it. But Biden has just shown us that there is indeed a path for Democrats to prevail in Georgia. And while Donald Trump demoralizes his supporters by essentially telling them that elections are pointless, Democrats are fired up and energized by Biden's success like never before.
The vision of a blue Georgia has long been a dream. Joe Biden just helped turn it into a reality. Now it's up to us to continue the progress we've already made.