"It was a useful meeting for all three of us, candid discussions but also a genuine sense of optimism and confidence in Canada", Horgan says, maintaining his objections to the major pipeline project.
Trudeau said that during the meeting today with the two premiers, he said that the federal government will use its authority to resolve the impasse. Expanding Trans Mountain - in operation since 1953 - would move an additional 590,000 barrels a day from Alberta's oil sands to a terminal near Vancouver.
- Legislative options - "We are actively pursuing legislative options that will assert, plus reinforce, the government of Canada's jurisdiction in this matter, which we know we clearly have", Mr Trudeau said.
Last Sunday, Kinder Morgan announced that it would be suspending all non-essential activities and spending related to the project.
Kinder Morgan Canada, part of Kinder Morgan Inc, is threatening to abandon the project unless it receives sufficient clarity about the path ahead on May 31.
The Liberals seem convinced only a small number of their 18 B.C. seats are at risk over approving a pipeline, but on Saturday, Quebec's minister for Canadian relations warned Trudeau it would be a mistake for Ottawa to ram through the project with no regard for provincial rules.
"I continue to engage with Indigenous leaders of all different areas and roles".
Arab League should try to solve regional problems instead of blaming Iran
There was little mention of Syria, whose president Bashar al Assad was not invited to the summit. The summit begins on Sunday in the East coast city of Dammam .
The move has been the subject of a heated trade battle between B.C. and Alberta since January and has seen almost 200 people arrested for demonstrating at Kinder Morgan work sites in Burnaby.
"I would also suggest that there is not a homogenous position on this issue amongst Indigenous communities", said Notley.
It set a May 31 deadline to get agreement that the project can proceed, notably on construction through B.C. where opposition runs highest.
She confirmed Alberta's interest in financially backing the Trans Mountain expansion, even going so far as buying out the $7.4 billion project. Neither Horgan nor Notley would comment on those options.
Notley said her province and Ottawa had agreed on a plan to "eliminate" investor risk surrounding the Trans Mountain pipeline expansion project - a commitment she said ensures the pipeline "will be built", although she refused to provide details.
"I'm quite confident that should these discussions end successfully, that the pipeline will be built - and that is good, because the pipeline is in the national interest".