One World Trade Center (GARY HERSHORN/REUTERS)

We’re hearing that former Justice Department official Amy Jeffress, finishing up her third year as the department’s attaché at the embassy in London, is a — if not the — leading contender to be nominated as the assistant attorney general for national security.

Jeffress, who had been Attorney General Eric Holder’s national security counselor before the London posting, would succeed Lisa Monaco, who officially moved to the White House in March to replace now-CIA Director John Brennan as the president’s chief homeland security and counter-terrorism adviser.

Before joining the Obama administration, Jeffress worked at Justice and in the Department of Defense during the Clinton administration.

We called the embassy Friday, but Jeffress declined to speak to us. (Shocking, no?) One knowledgeable source cautioned that no decision has been made and that there are other names in the mix.

Well, wouldn’t want to rush into things. It’s hardly been half a year since it was known the key Justice job was going to be vacant.