The catastrophic flooding in Louisiana is now being called the worst natural disaster in the U.S. since Superstorm Sandy.

Yet with callous indifference to those suffering, Hillary Clinton and President Obama are missing in action. Clinton has come up with lame excuses why she’s a no-show. And Obama is working on his golf swing with millionaires, billionaires and celebrities on Martha’s Vineyard.

Who needs them.

Donald Trump showed the country who’s boss yesterday by flying to Louisiana to comfort those affected by the catastrophic flooding. And boy, were Louisianans happy to see the Republican nominee.

Despite having lost everything — their homes, their belongings and even for some — their pets and loved ones — they still found strength and wherewithal to put up homemade Trump signs that said, “St. Amant (hearts) Trump.”

Residents took selfies with Trump and hugged him in gratitude for showing up in a time of need. Many yelled, “We’re glad you’re here!” as Trump and his VP pick, Indiana Gov. Mike Pence, toured the damaged areas and offered comfort.

This is what leadership looks like.

When a crisis hits, a leader shows up and delivers compassion. He also arrives with hugs to boost morale and solutions about rebuilding.

Trump’s mission of mercy stands in stark contrast to Democrats and left-wing media who were quick to tear into President George W. Bush for his “flyover” during Hurricane Katrina.

These are now the very same people who are giving Obama and Clinton a huge pass for not showing up while coffins were floating down streets in Louisiana. Can you imagine the horror?

We can’t and that’s exactly why Louisiana’s desperate residents needed a visit from a true leader. Trump showed voters that in a time of disaster and calamity, he’s not an Ivory Tower guy. He shows up and rolls up his sleeves.

Trump’s presence in Louisiana obviously won’t hurt him politically. He made Obama and Clinton look out of touch.

Clinton called the Louisiana governor, saying she decided not to visit because she didn’t want to distract from relief efforts there. Huh?

Obama now says he’ll visit Louisiana on Tuesday. Talk about too little, too late.

Like Benghazi, Clinton and Obama have shown once again that in a time of crisis, they are nowhere to be found.

Adriana Cohen is co-host of “Herald Drive” airing 6-9 a.m. Monday through Thursday on Boston Herald Radio. Follow her ?@Adrianacohen16.