Manila, Sept. 30 -- US President Donald Trump and Democratic nominee Joe Biden clashed Tuesday evening during a political showdown that repeatedly broke down into fiery exchanges and angry interruptions.

The clashes prompted moderator Chris Wallace to castigate Trump, whom he said interrupted Biden far more frequently during the night's debate than the vice president did the incumbent.

"Mr. President, please stop," Wallace said during one of dozens of times the president interrupted Biden. "The country would be better served if we allowed both people to speak with fewer interruptions. I am appealing to you, sir, to do that."

Biden also rebuked Trump, whom he said is "the worst president America has ever had," telling Trump "will you just...