"I don't know Putin, have no deals in Russia, and the haters are going crazy - yet Obama can make a deal with Iran, #1 in terror, no problem," Trump said in a tweet to his 24.1 million followers.
In recent days, Trump has been slammed by the opposition parties for saying that he wants to work with Russia and Putin in the fight against ISIS.
Senator Ben Cardin, Ranking Member of the Senate Foreign Relations Committee, alleged that Trump has made clear he does not believe in America's exceptionalism when he equated the United States to Vladimir Putin and his murderous regime.
"It is offensive to the American people, veterans, and brave servicemen and women who put their lives on the line everyday to protect our principles, liberties, and way of life," he said.
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"Political opponents and independent journalists in Russia have been attacked, jailed, and killed under Putin's regime. Anna Politkovskaya, a world renowned journalist was killed in her apartment building," he said.
The former Deputy Prime Minister and opposition leader Boris Nemtsov was gunned down steps from the Kremlin.
"Equating our country with an authoritarian, murderous regime is outrageous and reprehensible, even for Trump. All elected officials in the United States have a responsibility to speak up against the President's dangerous rhetoric," Cardin said.
Earlier, top US intelligence agencies has told Trump that Russia has interfered in the presidential election by hacking Democratic party computer networks, in the process helping political outsider Trump defeat his strong opponent and former Sectary of State Hillary Clinton.
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