President Donald Trump browbeat Russia on Thursday for its 'destabilizing activities in Ukraine and elsewhere and its support for hostile regimes including Syria and Iran' and urged Vladimir Putin's government to join the US and its allies in the fight against violent extremism.

Trump had refused earlier in the day to pin election hacking last year in the US on the Kremlin, saying he thinks it was Putin's government, but it 'could have been other people in other countries.'

And he did not mention Russia by name in his remarks to the Polish people when he committed the US making sure they are 'never again held hostage to a single supplier of energy.'

But turning to threats against the West later in his speech in front a memorial to the Warsaw Uprising, Trump railed against 'the steady creep of government bureaucracy,' 'radical Islamic terrorism' and 'powers that seek to test our will, undermine our confidence and challenge our interests.'

'To meet new forms of aggression, including propaganda, financial crimes and cyber warfare, we must adapt our lives to compete effectively in new ways and on all new battlefields,' he said in a direct reference to Moscow's meddling.

Speaking to thousands of cheering Poles, Trump called their nation 'the geographic heart of Europe' and praising their countrymen for shaking off both Nazi oppressors and Russian occupiers in the last century.

'That's trouble. That's tough,' he exclaimed.

'In those dark days, you have lost your land but you never lost your pride.' 

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President Donald Trump questioned if the West has the 'will to survive' in a landmark speech in Warsaw on Thursday afternoon