The process is not difficult. The decisions to expel foreign diplomats are not taken lightly.
In the tool kit of diplomacy that we use when we disagree with action and we want to protest action, it begins with conversations and statements. It goes through written exchanges and, ultimately, can get as serious as declaring someone persona non grata, which is what we did in the case of Chinese foreign interference.
Again, as I said, I was very involved in that. There is a public perception about Mr. Zhao's activities.
Let me say that the Vienna convention allows you to expel anyone for any reason, and you don't have to give a reason. We have been very clear with China, going back several years, that foreign interference is unacceptable. Police stations are unacceptable, balloons are unacceptable and interference in our institutions and our democracy is unacceptable.
We eventually expelled a foreign diplomat and then China, as everyone knows, on May 9, expelled one of our diplomats.