Tonight, markets bracing for another possible sell-off tomorrow, and no sign President Trump's backing down from the trade war he's starting.

With just hours to go before Wall Street opens, concerns of a so-called Black Monday as those punishing tariffs roll out and the Dow's worst week since 2020.

Now warnings of a possible recession this year. The Treasury

Secretary's new message to Americans, including those about to retire. There doesn't have to be

a recession. And the big question tonight, how much worse could it get? A second child, now dead

in that Texas measles outbreak, and the new message from the health

secretary, RFK Jr. about how effective the vaccine is.

But with the disease already spreading, is it too late?

Deportation Showdown, a federal judge blasting the Trump administration for wrongly deporting

a Maryland man as a deadline looms to bring him home. States of emergency

across the south over catastrophic flooding. This town in Kentucky, look at that, submerged.

One farmer having to take a boat to feed his cows. This is NBC Nightly News with Hallie Jackson.

Good evening. We are coming on the air tonight with the country and the markets bracing for what could be a devastating start to the week with fears of a so-called Black Monday on Wall Street.

The futures just opening up, giving us our first look at what could be another big drop tomorrow.

All of it after President Trump's newest tariffs

triggered a two-day stock sell-off.

The end result?

The worst week for the markets

since the start of the COVID pandemic,

with the Dow falling more than 5% on Friday alone.

Tonight, some top White House advisors

suggest those tariffs are here to stay for weeks,

...