Hello. From CNN, I'm Joe Beck, with the five things you need to know for Tuesday, September 26th.

President Joe Biden is set to join United Auto Workers strikers on the picket line today in Michigan.

Biden says he supports the UAW, but it's not clear whether he means the union's demands

or just their strike in general.

A source familiar with the situation says that the union's president will also be on the picket line.

This comes a day before former President Donald Trump is also set to visit union workers in Michigan,

although the source says the UAW is not involved in that visit, and there's

been no official invitation.

Trump is expected to skip the second Republican primary debate in California, which is scheduled

for the same day.

The UAW strike began on September 15th, and negotiations have been ongoing between the

Union and Ford, one of the three manufacturers they're striking against.

But there hasn't been the same amount of movement

when it comes to talks with General Motors and Stolantis, with the UAW saying on Friday,

it would be expanding its strike against them.

If the government shuts down at the end of the week, it could hurt the U.S. credit rating.

That's the warning from Moody's Investors Service.

It says that government debt payments would not be impacted, and that as long as a shutdown didn't

last too long, it shouldn't disrupt the economy.

But it would, quote, underscore the weakness of the US compared to other countries with the same

credit rating.

With the October 1st deadline looming,

...