 Irish premier Leo Varadkar on Thursday played down hopes of a swift end to wrangling over post-Brexit trading rules in Northern Ireland that has caused lengthy political paralysis in Belfast.On a visit to the British province, he said he was optimistic about ironing out disagreements about the Northern Ireland Protocol that prompted pro-UK parties to walk out of the assembly last year.Varadkar said he was hopeful of an agreement that would lead to the resumption of the power-sharing executive,... 