What is the speaker's opinion on the use of polls? What alternative method of selecting government leaders do they suggest?
Poll your ass off.  We have a process for selecting our government leaders.  It is called an "election".  Unless something changes, you are stuck with you choices made in 2016.  Next election is 2018, you are free to make your changes then.
Polls are bull----.  The were all wrong in the last election cycle.  The polls did not select our President, Representative or Senator.........the election did.  Live with it.