New York, June 9 -- US President Donald Trump has expressed high optimism regarding ongoing diplomatic engagements with Tehran, asserting that Washington is on the verge of securing a major breakthrough.

He made these remarks to journalists as he was leaving New York after watching a basketball game a little earlier. Trump faced a wave of loud booing from segments of the audience at Madison Square Garden on Monday whilst attending Game 3 of the NBA Finals between the New York Knicks and the San Antonio Spurs.

"I think we're ... very close to having a very, very good, strong, powerful deal," Trump said.

Reflecting on the strategic options available to Washington, the US President noted that while military action remains an option, it ca...