Washington (CNN) President Donald Trump attacked Senate Minority Leader Chuck Schumer in a tweet Sunday morning over the New York Democrat's criticisms of the North Korea summit.

"Thank you Chuck, but are you sure you got that right? No more nuclear testing or rockets flying all over the place, blew up launch sites," Trump wrote. "Hostages already back, hero remains coming home & much more!"

Chuck Schumer said "the Summit was what the Texans call all cattle and no hat." Thank you Chuck, but are you sure you got that right? No more nuclear testing or rockets flying all over the place, blew up launch sites. Hostages already back, hero remains coming home & much more! — Donald J. Trump (@realDonaldTrump) June 17, 2018

The President said in a follow-up tweet that the summit with North Korea is viewed favorably abroad, adding that the talks could save "millions and millions of lives."

The denuclearization deal with North Korea is being praised and celebrated all over Asia. They are so happy! Over here, in our country, some people would rather see this historic deal fail than give Trump a win, even if it does save potentially millions & millions of lives! — Donald J. Trump (@realDonaldTrump) June 17, 2018

"The denuclearization deal with North Korea is being praised and celebrated all over Asia," Trump wrote. "They are so happy! Over here, in our country, some people would rather see this historic deal fail than give Trump a win, even if it does save potentially millions & millions of lives!"

Trump also defended his decision to ensure a halt to war games in the region, which he characterized as "VERY EXPENSIVE" and needlessly provocative.

Holding back the "war games" during the negotiations was my request because they are VERY EXPENSIVE and set a bad light during a good faith negotiation. Also, quite provocative. Can start up immediately if talks break down, which I hope will not happen! — Donald J. Trump (@realDonaldTrump) June 17, 2018

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