Alan Bersin worked at the Justice Department in the 1990s and led a government crackdown on illegal immigrants at the California-Mexico border, known as Operation Gatekeeper.

VOA: standard.2009.04.15

And some consider the White House Chief of Staff as co-president, although I think Joshua disagrees with that, or the president's gatekeeper, that is, I think he agrees.

一些人认为,办公厅主任可以和总统平起平坐，虽然我认为约书亚不同意此观点，还有人说是总统的看门人，我认为这种说法他会同意。

普林斯顿公开课 - 国际座谈会课程节选

Let's look at how you work as the president's gatekeeper.

现在我们来看看,作为总统的主管你是怎么工作的。

普林斯顿公开课 - 国际座谈会课程节选

Some consider the WHCS as co-president or president's gatekeeper.

有些人认为白宫办公厅主任,和总统平起平坐,或者是总统的管家。

普林斯顿公开课 - 国际座谈会课程节选