Sen. John McCain John Sidney McCainMcSally says current Senate should vote on Trump nominee Say what you will about the presidential candidates, as long as it isn't 'They're too old' The electoral reality that the media ignores MORE (R-Ariz.) quickly fired back Thursday at President Trump's assertion that Congress is to blame for the deterioration U.S.-Russia relations.

"Our relationship w/ Russia is at dangerous low," McCain tweeted.

"You can thank Putin for attacking our democracy, invading neighbors & threatening our allies."

Our relationship w/ Russia is at dangerous low. You can thank Putin for attacking our democracy, invading neighbors & threatening our allies — John McCain (@SenJohnMcCain) August 3, 2017

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Trump on Thursday morning had a different take.

"Our relationship with Russia is at an all-time & very dangerous low," Trump tweeted.

"You can thank Congress, the same people that can't even give us [healthcare]!"

The tweet came the day after Trump signed into law a bill overwhelmingly approved by Congress that imposes new sanctions on Russia and curbs the president's authority to lift them.

Besides imposing new sanctions on Russia, in addition to Iran and North Korea, the bill would limit the president's ability to return diplomatic compounds seized by the Obama administration in retaliation for Russian election meddling.

After signing the legislation, Trump labeled parts of the bill an unconstitutional infringement upon his executive authority and his ability to negotiate with Moscow.

"By limiting the Executive’s flexibility, this bill makes it harder for the United States to strike good deals for the American people, and will drive China, Russia, and North Korea much closer together," Trump said in a statement.

"The Framers of our Constitution put foreign affairs in the hands of the President. This bill will prove the wisdom of that choice."

Russia's government responded to the sanctions by ordering the U.S. embassy and missions in Russia to reduce its diplomatic staff.