Democratic presidential hopeful Elizabeth Warren on Monday outlined proposals that would govern her policy on international trade, including requiring trade negotiators to disclose drafts of new trade agreements to the public.

Warren, who has offered the most voluminous policy proposals in the crowded field of Democrats hoping to challenge Republican President Donald Trump in the November 2020 election, also proposed a "border carbon adjustment" tax that would be levied against imported goods that require "carbon-intensive" manufacturing processes.

"Trade can be a powerful tool to help working families but our failed pro-corporate agenda has used trade to harm American workers and the environment," Warren said in a post on Medium.com announcing her trade position.