To which NDP leader John Horgan responded, "A majority of British Columbians voted for a new government".
Johnston said if the results remain a Liberal minority with the Greens holding the balance of power, Weaver has to be careful.
"There's still 176,000 seconds on the clock and I'm going to wait to see what the final outcome is", he said, referring to the number of absentee ballots still to be counted.
At the current seat count - 43 Liberals, 41 NDP and three Greens - Horgan suggested there is a clear mandate for change of leadership.
Among the casualties of the night was prominent BC Liberal cabinet minister Peter Fassbender, the former education minister, who conceded defeat to the NDP's Jagrup Brar in Surrey-Fleetwood.
If the NDP keeps the riding, a deal with the Green Party could create a coalition with 44 seats. "But that would also mean to do that he has to back the loser". "Andrew Weaver has to stick-handle through this very carefully. They want us to work across party lines".
The Greens doubled their popular vote from eight per cent in 2013 to 16 per cent Tuesday, said Kathryn Harrison of UBC.
Do the Greens stand to gain more by associating with the Liberals or NDP?
"It doesn't seem to me looking at this that there are a lot of seats that the NDP didn't pick up because of the Greens", he says.
Premier Christy Clark now leads, with 43 seats as opposed to the NDP's 41 and the Green party's 3.
However a minority scenario would likely mean negotiations between Green leader Andrew Weaver and both the NDP and Liberals.
However the final vote count will not be completed tonight.
The legislative minority means the tiny Green party will hold the balance of power as Premier Christy Clark tries to push forward with pipeline expansion plans and a promise to apply a levy to thermal coal exports to the USA in retaliation for U.S. duties on softwood lumber.
"My focus is on the people of British Columbia and if Mr. Weaver and others want to join with me, I am happy to do that".
"I think about the berry picker who came from India and settled in Abbotsford who worked for a dollar a day or even less.
I do not regret a single moment", said Horgan, who was acclaimed the party's leader in 2014. She can either enter into a formal coalition with one of these parties (presumably the Greens), or else can try to work together informally going forward. "That would be a long-term win for them so that's one they may be willing to risk in supporting the NDP", said Harrison.
One day ahead of the provincial election Tuesday, students cast ballots in a Student Vote parallel election put on by CIVIX, a national registered charity dedicated to building citizenship skills among young Canadians.
If the NDP had Green support to form a government it could possibly order more environmental or health assessments on the pipeline which would postpone the start of construction.
It has been four years since Clark promised the province a potentially trillion dollar LNG industry.
The final results of British Columbia's election are still not in, but already experts are predicting an unstable government that is unlikely to last a full four-year term.
"On a political junkie's level, it's very exciting and it was an exciting evening", he said.