While traveling Thursday on an airplane from Washington, GOP Sen. Jeff Flake debated a voter in a wide-ranging discussion about the GOP tax plan, the issue of Dreamers, the Affordable Care Act and the Children's Health Insurance Program.

Flake spoke for 11 minutes to a person who identified himself on his Twitter account as Ady Barkan, of California, according to a tweet posted by his friend. Barkan explained his current situation having been diagnosed with Lou Gehrig's disease, or amyotrophic lateral sclerosis, and how the tax bill would affect his health care to Flake.

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