It continued: "In his time working with us, Oliver left a long-lasting impact on the watch community as a whole; both suppliers and customers were taken aback by his vibrant spirit and kind heart and his loss is felt deeply by all that knew him."

“We’re in a society now of disinformation and misinformation. You’ve really got to be watching and on the watch when information comes in and validating and verifying it,” he said.

Last year, 484 people on the watch list were stopped at ports of entry along the northern border, compared with 80 at the southern border, according to CBP data.

When they reopened a small portion of Finland’s border with Russia on Tuesday, Finnish authorities said that they would be on the watch: If Moscow resumed funneling migrants, they would shut it again.

And not, I pray, on the watch of any American president who comes after me.