IT’S ALWAYS IN THE LAST PLACE YOU LOOK: Mysterious freshwater reservoir found hidden beneath the ocean.

BYRON YORK: What now, for those who denied a ‘crisis’ at the border?

PRAGER: Clarity About Nationalism. “Nationalism is beautiful when it involves commitment to an essentially decent nation and when it welcomes other people’s commitment to their nations. Nationalism is evil when it is used to celebrate an evil regime, when it celebrates a nation as inherently superior to all others and when it denigrates all other national commitments.”

FASTER, PLEASE: South Dakota’s Efforts to Protect Speech on Campus Could Be a Model for the Nation.

WHO IS THIS ‘WE,’ KEMOSABE? We thought Pete Buttigieg was qualified to be president. Then a shooting showed how mistaken we were.

JOE PAPPALARDO: Why Today’s Commercial Space Race Is Better Than Apollo.

ARE YOU SURE SHE ISN’T BERNIE SANDERS IN DRAG? Trump Rape Accuser Once Said “Women Love” Idea of Being Dragged Into a Cave by a Man.

HMM: The Boomers Ruined Everything. “In a variety of different areas, the Baby Boom generation created, advanced, or preserved policies that made American institutions less dynamic. In a recent report for the American Enterprise Institute, I looked at issues including housing, work rules, higher education, law enforcement, and public budgeting, and found a consistent pattern: The political ascendancy of the Boomers brought with it tightening control and stricter regulation, making it harder to succeed in America. This lack of dynamism largely hasn’t hurt Boomers, but the mistakes of the past are fast becoming a crisis for younger Americans.”

LET’S HOPE: Alito’s Strategic Vote Signals Reining In of ‘Law by Regulation.’

BECAUSE “DON’T BE EVIL” IS JUST SO MUCH ’90s NOSTALGIA: Google Censors Video Exposing Google.

WHO COULD HAVE SEEN THIS COMING? Pain patients left in anguish by doctors ‘terrified’ of opioid addiction, despite CDC change.

ANDREW MALCOLM: With 20 candidates vying for airtime, will this week’s Democratic debates matter?

If lucky, each candidate might get a total of maybe 10 minutes on camera, not much to describe their biography, positions on select hot-button topics, offer rebuttals and, since this is TV, likely offer a memorable zinger to stand out from the crowd.

Each will have an individual strategy. Frontrunner Joe Biden, for instance, must stay verbally disciplined and look presidential. He’s been doing this stuff for seven years longer than Pete Buttigieg has been alive.

Sen. Bernie Sanders is an old pro too, literally. The one-time mayor turns 78 this fall. He’s trailed Biden badly in polls and sees Sen. Elizabeth Warren closing in quickly. Sanders will stand next to Biden the second night and is the most likely to go after the ex-vice president, perhaps over Biden’s recent abortion flip.

Others may snip at each other or draw stark contrasts, but history suggests such early TV opportunities are best used to make your own introductory points — and mention your website at least once. A good impression can help immensely with fundraising in these crucial closing days of the second quarter.

These debates are quite tense and tiring affairs, as they should be testing wannabe commanders-in-chief. All will have prepared, rehearsed with staff throwing unexpected questions and insults, memorized a few key lines to utter as if they just came to mind.

He’s too kind.

ROGER SIMON: Can Trump Actually Win the Black Vote?

WINNING: Mexico Sends 15,000 Troops to Border ‘to Curve Migration Flow.’

FLASHBACK: What Fuels Trump Derangement Syndrome: Gentry-Class Status Anxiety.

HOW’S THAT SPACE PROGRAM GOING? My USA TODAY column is about killer asteroids.

NEW SOCIALIST “IT” GIRL CONTINUES TO PAY DIVIDENDS: Ocasio-Cortez Backtracks On Concentration Camp Remark, Blames Liz Cheney.

RON SULLIVAN: Why Harvard Was Wrong To Make Me Step Down As Faculty Dean For Representing Harvey Weinstein.

CNN ON IMMIGRATION: Never Seen This Level Of Cooperation From Mexico Before.

THE TREASURY WILL BE HAPPY TO ACCEPT THEIR CHECKS IN ANY AMOUNT, NO NEW LAWMAKING REQUIRED: A group of US billionaires is calling for a wealth tax.

Signatories include investor George Soros, Facebook’s co-founder Chris Hughes, and Molly Munger, daughter of billionaire Charlie Munger.

The group said they were non-partisan and not endorsing any candidate.

The open letter said: “A wealth tax could help address the climate crisis, improve the economy, improve health outcomes, fairly create opportunity, and strengthen our democratic freedoms. Instituting a wealth tax is in the interest of our republic.”

Among the 18 were a descendant of Walt Disney and the owners of the Hyatt hotel chain. Many in the group have been associated with progressive initiatives on issues such as climate change and the growing wealth gap.

Go on and write 18 checks, for whatever amount will ease your consciences. Maybe add another hundred million or two, just to be extra-assuaged.

COLLUSION: After years of warnings, U.S. finally investigating secret foreign funding of American universities. “They can no longer expect to ignore the law with impunity.”

Related: China, not Russia, is the biggest threat.

Also Related: While Everyone Is Distracted By Russia, Chinese Spying And Influence Runs Wild. But it’s not just China.

KURT SCHLICHTER: Trump Dodged An Ambush By Avoiding War With Iran.

REPUBLICANS POUNCE! The Right Comes for a Knitting Website.

Forget it, Jake — it’s Salon.

A VOICE OF SANITY: Sen. Tim Scott on campus anti-Semitism, free speech, and more.