Republican debate veers from abortion and fentanyl to Trump and Ukraine as Harris attacks ‘extremist agenda’ – as it happened

This blog is now closed. You can read our latest stories about the debate below:

• Full report: GOP candidates clash on debate stage
• Savage animals': Trump attacks left' in Carlson interview
• Combative Vivek Ramaswamy surprise focal point of debate

Onstage at the Republican presidential debate tonight is the governor of North Dakota, Doug Burgum - who almost didn't make it.

He has managed to make the event despite requiring crutches and wearing a boot after hurting his Achilles tendon while playing basketball.