While I love the article, the above is either a glaring error or a new revelation, as this is the first time I have heard that Andrew Weissmann had any involvement in obtaining FISA warrants against Carter Page.
Did I somehow miss something?
Lots of stories out there about exactly that... I just did a search with a copy/paste of your exact phrase. https://duckduckgo.com/?q=Andrew+Weissmann+had+any+involvement+in+obtaining+FISA+warrants&atb=v139-1__&ia=web