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Kerry: Trump attacks on Biden are 'unbecoming of a president'

Kerry: Trump attacks on Biden are 'unbecoming of a president'
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Former Secretary of State John KerryJohn Forbes KerryBiden: ‘Totally legitimate’ to question age if he runs in 2020 Kerry decries ‘broken’ Washington Christine Blasey Ford has a credibility problem MORE tore into President TrumpDonald John TrumpTrump renews attacks against Tester over VA nominee on eve of Montana rally Trump submits 2017 federal income tax returns Corker: Trump administration 'clamped down' on Saudi intel, canceled briefing MORE in an interview aired Sunday for the president's latest attacks on former Vice President Joe BidenJoseph (Joe) Robinette BidenBiden: I hope Dems don't move to impeach Trump if they retake the House Biden: Trump administration 'coddles autocrats and dictators' Election Countdown: O'Rourke goes on the attack | Takeaways from fiery second Texas Senate debate | Heitkamp apologizes for ad misidentifying abuse victims | Trump Jr. to rally for Manchin challenger | Rick Scott leaves trail to deal with hurricane damage MORE, questioning why he is focused on Biden instead of policy issues.

"It's so personal. So unbecoming of a president of the United States to engage in that ... it shows fear or something, I don't know," Kerry said on CBS's "Face the Nation."

"Why is he picking that at this point in time when he has major issues he needs to deal with?" he added.

The former secretary of State was reacting to an interview Trump gave to CBS News last week in which he said Biden would be a "dream" opponent in a 2020 presidential campaign.

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"Look, Joe Biden ran three times," Trump said. "He never got more than 1 percent and President Obama took him out of the garbage heap, and everybody was shocked that he did. I'd love to have it be Biden."

Biden, who has been critical of Trump's policies and rhetoric, is considered among the front-runners for the Democratic presidential nomination in 2020. He has yet to announce if he will run for president.

Kerry lambasted Trump's comments, saying his administration has bungled its response to the president's meeting last week with Russian President Vladimir Putin, and has provided limited information on its ongoing negotiations with North Korea.

"That's what he's trying to run away from. He wants to have you raising the question you just raised with me, which is the real question in the moment, nothing about Joe Biden or what happened in the last campaign and everything," Kerry said.

"What he does is, he's always looking for the diversion, always moving away from the real business of our country because he doesn't know how to do the real business of our country," Kerry said.