Math ain't mathing in that article.
It is some relative of Trump's understanding of percentages.
75% is not double or more.
A 75% increase of a $51 premium would still be below $100 a month - not o over $2000 a month.
If the average dollar increase is $1200, that means the premiums are currently averaging $1500 (nowhere near what the $15 example in the article says their current v premium is), and will go to to $2700 a month.
I'm sure the premiums are going to increase dramatically, and an glad they are getting PR - during the shutdown so that people will understand what the loss of subsidies will mean to their pocketbook. But it is hard to tell from the article how much they are currently paying, let alone what they will jump to because the percentages funny match the dollars.