Portside

The Iowa results demonstrate how polarised and volatile American politics has become – from left to right, old certainties have been swept aside.

Now the pace accelerates: New Hampshire next week, followed by South Carolina, Nevada and the Super Tuesday states, as more and more Americans discover that a presidential campaign has begun. Iowa will be dissected over the next days, but here are five quick takeaways the morning after.

Ta-ta, Twitter; Faux News war pig; Megyn Kelly without tears; Kochs spook Jane Meyer; Drug ad backlash; The new Birth of a Nation

After premiering to prolonged standing ovations and plenty of critical acclaim, the slave revolt drama, Birth of a Nation, set off the fiercest bidding war Sundance has ever seen. Fox Searchlight has come out on top, landing the drama in a record-breaking $17.5 million deal, the biggest purchase in Sundance history.