PHOENIX (AP) — The Latest on President Donald Trump's visit to Arizona (all times PDT):

8:40 p.m.

President Donald Trump says he thinks the U.S. will "end up probably terminating" the North American Free Trade Agreement with Canada and Mexico "at some point."

Trump tells supporters at a Phoenix, Arizona rally that, "Personally, I don't think we can make a deal because we have been so badly taken advantage of."

But he cautions he has yet to make up his mind.

The U.S., Mexico and Canada began formal negotiations last week to rework the 23-year-old trade pact that Trump slammed during his campaign as the "worst" in history.

The Canadian and Mexican negotiators believe NAFTA needs to be updated. But they have defended the pact, which eliminated most barriers on trade between the countries, as an economic success story.

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8:30 p.m.

President Donald Trump is going after Arizona's Republican Sens. Jeff Flake and John McCain at a Phoenix rally — but coyly refusing to mention their names.

Trump says that after his well-received address Monday evening, he was told: "Please, please Mr. President, don't mention any names. So I won't."

Instead, Trump is bemoaning that the Senate was only "one vote away" from passing a health care overhaul. McCain, who is undergoing treatment for an aggressive form of brain cancer, voted against a Republican health care bill.

Trump is calling another unnamed senator "weak on borders, weak on crime." Trump has lashed out at Flake, a frequent critic, using the same language in the past.

Trump is describing his own restraint as "very presidential."

City leaders in Phoenix, used to hosting candidate Trump during the 2016 campaign, say they're ready for President Trump's next visit Tuesday for a rally. They're preparing for protests outside the venue and say violence will not be tolerated. (Aug 21)

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8 p.m.

President Donald Trump is threatening to shut down the federal government unless Congress provides funding for his promised border wall.

Trump tells a rally crowd in Phoenix, Arizona, that he has a message for "obstructionist" Democrats.

He says, "If we have to close down our government, we're building that wall."

Trump is also accusing Democrats of putting American security at risk for not supporting the proposal.

The wall was one of Trump's most popular campaign vows, prompting frequent rally chants of "Build that wall!" Trump had promised Mexico would pay for the wall, but Mexico has so far refused.

The House has passed a spending bill with funding for the border wall, but it faces an uncertain future in the Senate.

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