With the US election so close to call, and with so much anger (and disbelief) on either side, how will the winner ever bring both sides together?

I think it's too close to call.

Polls say Hillary is very slightly ahead, but with Trump continuing to gain, I think he may win.

He may lose the electoral college thus Hillary will be President Elect, with Trump still winning the majority in the actual popular vote.

Either way, it makes leading difficult. There will be pools of bad blood on either side.

If that happens, how will they lead and bring the country together?

Not that I think either of them believes that is even possible.