His advice was the exact opposite of what they did. He advised that it would lead to trouble to encourage those who could not qualify for loans to borrow money and become "home owners." That of course was what was encouraged by Barney Frank, Chris Dodd and all the other Democrats. and
THAT is precisely what led to the toxic sub-prime mortgages with the crony bankers bundling them into shaky "derivatives." Then the inevitable happened when the borrowers could not pay and walked away from their rotten mortgages -- the bubble burst, and here we are.
Trying to blame this on Newt is the height of BS. No one is dumb enough to buy that.
Given that a lot of rightwingloons blame the financial meltdown on Fannie and Freddie, and given that Newt was a lobbyist/historian/adviser for Fannie and Freddie, it makes logical sense that his "advice" led to the financial collapse.
What was the advice he gave them?