President Donald Trump seems to have learned the lesson painfully gleaned by all his 21st-century predecessors: You can’t reset US relations with Vladimir Putin.

Vladimir Putin has "played Donald Trump like a violin" - but may have now pushed things too far, the former head of MI6 has warned.

It has to happen earlier,” Braže said. She welcomed Trump’s announcement that the U.S. would send weapons to Ukraine and impose secondary tariffs of up to 100% on countries still trading with Russia if Moscow fails to agree to a peace deal within 50 days.

Trump's threat against Russia runs parallel to a Senate-led effort to pass crippling sanctions on countries that buy Russian energy.

Donald Trump has grown increasingly frustrated with his Russian counterpart over the Kremlin's unwillingness to engage in peace negotiations on Ukraine.

When Donald Trump arrived at the White House for the first time nine years ago, he vowed to tear up the rule book, upend the world order and fundamentally change America's approach to its foreign relations.

In response, 65 percent of Trump voters backed the provision of arms to Ukraine, almost three times the 22 percent who opposed the move. The results suggest a shift in attitudes among Trump supporters toward aid for Ukraine over the past six months.

But Putin appears to be unfazed by these latest development and is refusing to kowtow to Trump and his demands. READ MORE: NATO considers retaliation against Russia as WW3 and plane crash fears soarREAD MORE: Vladimir Putin launches attack on Ukraine a day after Trump's '50 days' threat Instead the Kremlin has intensified its attacks on the White House incumbent,

Having falsely labelled Ukraine’s President, Volodymyr Zelensky, a “dictator”, wrongly claimed he was responsible for the three-year war, and appearing to have more sympathy with Vladimir Putin, Trump has effectively made a 180-degree turn.