You may need a visa this summer if you are going to Europe. If you do, you have Congress to thank for their nonsensical intervention and amendment of the Visa Waiver Program.
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The President exercised the open-ended discretion Congress gave him in a predictable way.
The argument that the Visa Waiver Program is inherently a security risk is nonsense.
Even a scaled back Visa Waiver Program would let in a lot of people without much screening as the system is only as good as the answers provided on immigration forms. But, the law does have a weird stopgap to address this problem, at least retrospectively.