Tonight on All-In.

Elon and Vivek don't need much of an introduction here in Congress.

The party of Trump dusts off the old playbook.

There is an enormous amount of waste fraud and abuse in the government.

As Republicans begin saying the quiet part out loud.

John Thune, who is the Senate incoming Republican leader who also met with Elon Musk this

morning, told me that perhaps mandatory programs are areas that they're looking to make

cuts in, like Social Security, for example.

And another day of bad headlines for Trump's Pentagon pick.

I don't answer to anyone in this group.

None of you, not to that camera at all.

Senator Richard Blumenthal on where the Hegset nomination is going.

As long as Donald Trump wants me in this fight, I'm going to be standing right here in this fight.

And new evidence in the shooting death of an insurance executive as the manhunt for the suspect continues.

It all in starts right now.

Good evening from New York. I'm Chris Hayes.

Congress is back and they are ready to get going in the Trump era.

So what you might ask the top priority is we approach this new Republican trifecta? Well, in the past 24 hours, House Speaker Mike Johnson has spent

much of his energy talking up two billionaires nobody voted for, who have been deputized by

Republicans to make the government do less for you. We're all excited.

I know you're all excited that Elon Musk and Vivek Ramaswamy have joined us today.

This is an important day.

...