Arizona, April 17 -- US President Donald Trump on Friday (local time) expressed optimism about ongoing negotiations with Iran, saying discussions are set to continue through the weekend as efforts intensify toward a potential agreement.

Speaking to reporters after landing in Phoenix for a Turning Point USA event, Trump indicated that the talks were progressing positively, though he stopped short of confirming a breakthrough.

"We've had some very good discussions ... and we've done a good job, but we'll see. Talks are going on, and we'll go on over the weekend," Trump said.

"A lot of good things are happening, and that includes Lebanon, too," he added.

Responding to remarks from Iranian officials that significant differences still exis...