By John Irish, Jarrett Renshaw and Andreas Rinke KANANASKIS, Alberta (Reuters) -Group of Seven leaders faced early challenges during meetings in Canada on Monday as U.S. President Donald Trump said removing Russia from the former Group of Eight over a decade ago had been a mistake.

Before heading into a meeting with Carney, Trump said expelling Russian President Vladimir Putin from the group, then called G8, was a mistake He also said he feels a US-Canada trade deal is achievable but he won't give up his belief in tariffs Trump's one-on-one with Carney comes amid tensions between Washington and Ottawa over trade and security Edited by Brandon Livesay with chief North America correspondent Gary O’Donoghue and Jessica Murphy at the G7 in Alberta It's the inaugural gathering for several key leaders,

Speaking at the G-7 summit in Canada, President Trump said Iran needs to resume talks to end its nuclear program immediately.