President Trump is frustrated, that is clear. His cabinet remains half (or more) empty as the third week of his reign begins, and he has only one 'thing' to blame...

It is a disgrace that my full Cabinet is still not in place, the longest such delay in the history of our country. Obstruction by Democrats! — Donald J. Trump (@realDonaldTrump) February 8, 2017

However, President Trump has some alternative facts as there have been many nominees who have been forced to wait considerably longer for their confirmation...

Source: FiveThirtyEight.com

Confirmed Obama nominees waited for an average of 35 days. George W. Bush’s waited for an average of 16 days, Bill Clinton’s for 16 days, George H.W. Bush’s for 21 days, Ronald Reagan’s for 13 days and Jimmy Carter’s for 6.

Of course, the question Trump rightfully implies is 'is this obstruction' with no cause?