President Donald Trump seems to be having a hard time filling a key role in the White House ― and his Twitter critics are seizing the opportunity to offer some mocking suggestions.

Trump said over the weekend that John Kelly would be leaving the chief of staff position by the end of the year. However, his reported top pick to replace Kelly ― Nick Ayers, Vice President Mike Pence’s chief of staff ― said he’s leaving the administration by the end of the year as well.

Ayers on Sunday tweeted:

Trump then sent out his own message later in the day playing down his interest in Ayers and saying he was interviewing “some really great people” for the job: