U.S. President Donald Trump said on Sunday he will introduce new 25% tariffs on all steel and aluminum imports into the U.S., on top of existing metals duties, in another major escalation of his trade policy overhaul.

Reciprocal tariffs on trading partners are also in the mix as officials say “punitive” tariffs on Mexico and Canada were only a small slice of trade agenda.

President Donald Trump has said he will announce a 25% import tax on all steel and aluminium entering the US, a move that will have the biggest impact in Canada.