Despite Trump's renaming of Lake Ontario, Great Lakes endure as symbol of U.S.-Canada collaboration

The Great Lakes, one of the largest stores of freshwater and a source of water for some 40 million people, have long symbolized how closely intertwined Canada and the U.S. are.

U.S. President Donald Trump took a public sledgehammer to that relationship Thursday as part of his trade war with Canada, signing an executive order directing that Lake Ontario be renamed Lake America.

It's unclear whether Trump can unilaterally rename the lake, whose name predates European colonization of the Americas and has been widely recognized internationally for centuries. But the move comes amid a broader push by the Trump administration that has hindered U.S.-Canada collaboration on scientific research and restoration work in the Great Lakes.

Scientists at U.S. weather forecasting agency ordered to get clearance before talking to Canadian counterparts

The U.S. is cutting billions from science. Canadian researchers say it's time to step up

"The way that this current administration in the United States views the environment and views science is demoralizing," said Aaron Fisk, professor at the Great Lakes Institute for Environmental Research at the University of Windsor.

"With the U.S. moving away from evidence-based decisions about the environment … that's a real concern to me because we need them to be a world leader. This really goes against their long term investment in good science," he said.

As part of its massive cuts to the federal public service, the Trump administration has made major cuts to iconic U.S. scientific agencies such as the National Oceanic and Atmospheric Administration and the Environmental Protection Agency. Those cuts have, in turn, affected monitoring and research in the Great Lakes.

"The water does not respect political boundaries, and you have to manage it as a water body, as a watershed, not just as a national or state or provincial boundary," said Joel Brammeier, president and CEO of the Alliance for the Great Lakes , a U.S. non-profit that advocates for Great Lakes conservation and restoration.

"Which is why it's always a bit painful when we see somebody out of the U.S. side challenging that collaboration. Because, honestly, the Great Lakes don't get cleaned up and they don't get protected unless the U.S. and Canada collaborate and co-operate."

Even amid the cuts, support for the Great Lakes has crossed political lines. The Great Lakes Restoration Initiative , a two-decade-old program to restore ecosystems and clean up industrial pollution, was targeted for near-total elimination by Trump during his first administration.

The U.S. House of Representatives voted to reauthorize the program through 2031, with nearly $500 million US in federal funding per year going to local communities in the region. The measure received both Democratic and Republican support and is now working its way through the U.S. Senate.

"There are few issues that unite political parties like the Great Lakes. The Great Lakes Restoration Initiative has been so successful in doing that," Brammeier said.

The Great Lakes region has been central to industrial growth in both the U.S.