Chris Wattie / Reuters Prime Minister Justin Trudeau and B.C. Premier John Horgan take part in a news conference on Parliament Hill on July 25, 2017.

OTTAWA — An apparently clumsy moment and a small pool of water in the House of Commons foyer helped illustrate the biggest disagreement between B.C.'s new premier and Prime Minister Justin Trudeau after their first face-to-face meeting Tuesday.

As a reporter began to ask John Horgan about Kinder Morgan gearing up to build its $7.4-billion expansion project in September and the need for provincial permits, Horgan raised his right hand and accidentally knocked a glass of water by his side. The glass bounced on the marble floor, clattering as its contents splashed the premier's lectern and spilled in front of the television cameras. "Spills can happen anywhere," Horgan deadpanned. The quick wit sparked laughter from reporters. "We'll get people to clean that up right away," Trudeau responded. "There's a federal response for that," the premier added, smiling. Horgan campaigned hard against pipeline Horgan's NDP campaigned this spring vehemently opposed to the expansion of the Trans Mountain pipeline from Alberta to B.C. "The Kinder Morgan pipeline is not in BC's interest," the party's platform states. "It means a seven-fold increase in tanker traffic. It doesn't, and won't, meet the necessary conditions of providing benefits to British Columbia without putting our environment and our economy at unreasonable risk." Trudeau approved the project last November, despite opposition from environmentalists, many Indigenous leaders and some of his own mainland B.C. MPs. During the election, Horgan — who now leads a minority government propped up by the B.C. Greens — pledged to use every tool possible to stop the project. In May, he said he'd cover just what those tools would be with Trudeau. "I'm going to be discussing those with the prime minister the day after the election," he said during a campaign stop in Kamloops.

Chris Wattie / Reuters Prime Minister Justin Trudeau meets with B.C. Premier John Horgan in Trudeau's office on Parliament Hill on July 25, 2017.

But Tuesday, the men who were wearing near-identical outfits — blue suits, light blue shirts, dotted ties and brown leather shoes — wished to stress only areas of similarity and agreement. If there were any disagreements between Trudeau and Horgan during their 35-minute meeting — during which the pipeline was discussed — neither man showed it. "I'm very much looking forward to working with you, John," Trudeau told Horgan, as he listed off their topics of conversation: B.C.'s raging forest fires, the opioid epidemic, funding for child care and affordable housing, as well as the premier's upcoming trip to Washington to discuss a softwood lumber deal and the impending NAFTA negotiations. More from HuffPost Canada: B.C. Green Leader Leery Of Premier's 'Change In Language' On Pipeline

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Jagmeet Singh Comes Out Against Kinder Morgan, Energy East Pipelines "Thank you, prime minister. And thank you very much for the warm welcome here in Ottawa today," a smiling Horgan told Trudeau. "Quite often, as you may well know, we feel isolated and alone on the other side of the Rocky Mountains, but to have an ally in the prime minister to talk about these critically important issues that resonate right across the country — affordable housing, access to affordable child care — those are constants right across the country, and Canadians are looking for leadership, and I'm grateful to see it coming from the prime minister on those areas," the NDP premier added. Notably missing from Trudeau's or Hogan's list of topics discussed, of course, was that pesky matter of the Kinder Morgan pipeline.