Only one man's opinion that "The bill, S. 1237, was introduced last week at the Justice Department’s request". Even that statement isn't correct based on the two additional cites, which indicate the bill was reintroduced.
As I indicated, Gottlieb's contentions may well be correct, but NO conclusions can be drawn from this article except an insight into Gottlieb's philosophy. This email, and the other two cites, do not establish a connection between the AG and the introduction of S. 1237.
Lautenberg: "It took years, but the Administration finally realized that letting terrorists buy guns is dangerous. This 'terror gap' in our gun laws has been open too long and I am going to shut it down," said Sen. Lautenberg.
[Snip]
Following the GAO report in March 2005, Sen. Lautenberg wrote letters to Attorney General Alberto Gonzales and FBI Director Robert Mueller requesting recommendations on existing laws and Department of Justice (DOJ) regulations permitting terrorists to purchase guns and, in response to the Senator's request, the DOJ created a department-wide working group. That working group produced the legislative recommendations that Lautenberg introduced on Thursday.
There's your smoking gun.