Republican debate: Trump v Bush and Cruz v Rubio as tempers flare – as it happened

Rubio speaking with visible emotion about his experience on the foreign relations committee - giving a strong answer. “I saw the images of these little children being gassed by their own leaders,” he says. “And I was angry.”

But says it was the right decision to vote against Obama’s plan. The audience cheers.

Now questioning moves on from Scalia.

Trump, asked what questions he would ask if he was elected, immediately moves to ISIS. Rubio, handed the same question, keeps the theme in the Middle East. Is this going to become a foreign policy debate all of a sudden?

Ted Cruz says that for 80 years, judges were not appointed in election years.

Something of a kerfuffle follows, regarding justice Kennedy’s appointment - the moderator argues with Cruz over the actual time of his appointment versus his confirmation.

The audience doesn’t like candidates being fact-checked, and boos Dickerson for his impudence.

Jeb! Bush gets his first question of the night. Asked about Bernie Sanders’ litmus test for judges - does Jeb have one?

“Not on specific issues,” Jeb answers. “Not at all.”

“The simple fact is, the next president needs to appoint someone with a proven conservative record.

Marco Rubio says that Scalia will go down as “one of the great justices of this republic.” Adds that he doesn’t believe Obama - whom he calls a “lame duck president” - should get to choose the balance of the supreme court by nominating a successor.

Ben Carson - who is still in the race - up next, with a constitutional question. “The supreme court is a very important part of our governmental system,” he says. Hits out at the “truly nasty remarks” he’s seen about Scalia on social media.

John Kasich up to bat next. He wishes the president would consider not nominating somebody - and if he does, wants him to go for somebody with cross-party approval. “I don’t think he will, though.”