The president’s tweet about the Carrier plant was a clear reference to the United Technologies Corp. plant in Indianapolis that is being mothballed.

It’s unclear what it could mean for the Carrier deal or the jobs at United Technologies.

The U.S. Senate voted overwhelmingly on Tuesday to approve legislation that will keep the U.N. building site open and save American jobs.

Trump tweeted Monday that he had approved the bill because of Carrier’s decision to stay in the United States.

“Thank you to Carrier, for staying.

You have saved jobs, and they are now coming back to the USA,” Trump wrote.

Carrier announced last week that it was closing the Indianapolis plant and moving to Mexico.

The decision has been praised by labor groups and environmentalists, who said it would create jobs for hundreds of thousands of American workers.

In a tweet Monday, Trump also referred to Carrier’s move as “disgraceful” and said he would not approve a deal that would allow U.A.E. to keep building its plant in Indiana.

“This is just another disgraceful move by U.B.E.,” Trump said.

“They want to bring back their horrible plant in Ind.

They have no choice.

I am asking Congress to cancel this terrible deal.”

The U,T.C. said Tuesday that it will not stop building the plant until it receives assurances that the president will not make another deal that allows it to keep it in the U.,T.I., if it does not do so.

U.T.A., which was forced to lay off thousands of workers as it shuttered the Indianapolis facility in 2016, said Tuesday it would continue with its plan to build a $1.7 billion plant in Mexico.

U.,TT.

A has said it plans to start construction on the $1 billion plant this year.

The company is working with the state to finalize a tax break for U.TT.

C., the company said.

It said the U,TT.

S., plant would employ more than 1,000 people and create more than 600 permanent jobs.

In February, the company announced that it had secured a $2 billion federal loan for the project.