1. Exit polls have a much larger intrinsic margin for error than regular polls.

2. Exit polls have consistently overstated the Democratic share of the vote.

3. Exit polls were particularly bad in this year’s primaries. 

4. Exit polls challenge the definition of a random sample.

5. Democrats may be more likely to participate in exit polls. 

6. Exit polls may have problems calibrating results from early voting.

7. Exit polls may also miss late voters. 

8. "Leaked" exit poll results may not be the genuine article.

9. A high-turnout election may make demographic weighting difficult. 

10. You’ll know the actual results soon enough anyway.