How can you tell when a poll is actually high quality? Natalie Jackson, research director at PRRI, joins us on this week's episode of The Downballot to discuss that and more. Jackson tells us the indicators she looks for to determine whether a survey is worth taking seriously, what she thinks the future of polling aggregation ought to look like, and why white evangelical Christians are the real outliers when it comes to religious groups' views on abortion.Co-hosts David Nir and David Beard also break down Democrats' big special election victories in Pennsylvania; new efforts by progressives to pick their preferred GOP opponents in two key Wisconsin races; the first true retirement from the House this cycle; and a proposal to increase the size of the House, which has been capped at 435 members for more than a century.On Daily Kos Elections: The House stopped growing over a century ago even as the U.S. quadrupled. A new bill would fix that.Transcript available here.