[mmcdermott]

None of the articles I found went into more detail than the NY Times one. What they all say in common is that the French researcher was denied entrance. If the US version is true (and I can't be sure either way), then the presupposition would be that individual was already on a DHS list, not that customs necessarily found it.

As for whether they knowingly let a spy leave, that would depend on a full timeline.

[lovich]

> As for whether they knowingly let a spy leave, that would depend on a full timeline.

No it does not if the defense for denying him entry was knowing that he was a spy?

Stop arguing out of both sides of your mouth. So far both proffered explanations are unacceptable.

To be clear the two answers so far have been,

1: we found personal comments of him on his phone critical of the administration and denied him entry based on that, which is unacceptable on free speech grounds

Or

2: he was known or found to have secrets from one of our nuclear labs and was denied entry based on the fact that we knew he had these forbidden files, and we let him go. This is unacceptable on national security grounds.

You can’t mix and match from the two scenarios

[mmcdermott]

That's a false dichotomy. The severity depends on what the individual attempted to remove. Nuclear secrets might be unacceptable to allow him to leave. Something more administrative might not be worth the jurisdiction hassle to prosecute but still get the individual flagged against re-entry.