After US President Donald Trump announced new tariffs on Wednesday, several world leaders have criticised the move and warned of possible backlash.

Canadian Prime Minister Mark Carney vowed on Wednesday night to “fight” the new tariffs and said he would seek support from other international partners, writes Fox News.

Carney said Trump’s measures will fundamentally change the international trading system and will have a negative impact on the US economy, which in turn will affect Canada. He specifically pointed to tariffs on energy products and foreign vehicles.

Canada’s Conservative leader Pierre Poilievre supports “targeted, reciprocal” tariffs on US goods and wants to negotiate a new trade deal with Trump if his party wins the election.

Italian Prime Minister Giorgia Meloni called Trump’s tariffs “wrong” and warned they will hurt both US and European citizens, as well as help Western adversaries. She said Italy will work towards a deal with the US to avoid a trade war.

Ireland’s Deputy Prime Minister Simon Harris expressed deep regret at the new tariffs and pledged to work with Washington to end this “tariff war”. He fears significant effects on Irish investment and the economy.

The Chair of the European Parliament’s Trade Committee, Bernd Lange, called for a united response from countries affected by Trump. He argued that while Trump calls the day a “liberation day”, ordinary US citizens will experience it as an “inflation day”.

The UK and Mexico’s president said they will continue to co-operate with the US and not rush into imposing reciprocal tariffs.

Australian Prime Minister Anthony Albanese called Trump’s decision “not an act of friendship” but said Australia will not impose reciprocal tariffs and will continue to negotiate to have them lifted.

“The US tariff increases are bad news for the global economy and for an open country like Norway. This will affect Norway and Norwegian companies, but it is too early to say how serious it will be. No country is served by trade wars and increased tariff walls,” Jens Stoltenberg told E24 in a comment late on Wednesday evening.

He repeats the message that it is now more important than ever for Norway to join the EU.

“Now it’s important that we continue our efforts to ring-fence the EEA agreement, stay on the inside of any protective measures from the EU and keep the Norwegian economy in order,” concludes Finance Minister Stoltenberg.