In all due respect, I'm not so sure it's credible to quote leading news organizations about -- oh, never mind. Anyway, let me quote the Lewin report. The Lewin report is a group of folks who are not politically affiliated. They analyzed the senator's plan. It cost $1.2 trillion.
The senator's plan is in US dollars
The senator is presumably American, and his plan would be in American dollars
( z1 plan :ARG0 ( z2 person :ARG0-of ( z3 have-org-role :ARG2 ( z4 senator ) ) ) :ARG1 ( z5 dollar :mod ( z6 country :name ( z7 name :op "US" ) ) ) )