If you’ve been following the US Presidential election over the last few weeks, you will have noticed a lot of analysts putting a huge emphasis on polling. 

It comes off the back of a recent poll in Ireland, which put Fine Gael back as the most popular party in the country 

So, what are these opinion polls, and how are they carried out? 

Kevin Cunningham is a Lecturer in Politics at TU Dublin and MD & Founder at Ireland Thinks and joins Seán to discuss.