As Donald Trump prepared to unveil a swathe of reciprocal tariffs, global markets braced and some Republican senators voiced their opposition to a strategy that critics warn risks a global trade war, provoking retaliation by major trading partners such as China, Canada and the European Union. The US president said on Monday he would be “very kind” to trading partners when he unveils further tariffs this week, potentially as early as Tuesday night. The Republican billionaire insists that reciprocal action is needed because the world’s biggest economy has been “ripped off by every country in the world”, promising “Liberation Day”…