Can Americans Trust the 2020 Presidential Polls?

In 2016, polls consistently showed Donald Trump trailing Hillary Clinton, so pundits were shocked at his victory. This time around, polls once again give the Democrats a comfortable lead, but are they any more reliable than last time? Sean Trende is a senior analyst for RealClearPolitics who has been tracking the 2020 polls. He tells Hari Sreenivasan his key takeaways.