Aggrandizement:
an increase in power or importance:
He gives a lot of money to charity, but personal aggrandizement/self-aggrandizement is his motive. [Cambridge Dictionary]
Noted in “John Brennan: I will speak out until integrity returns to the White House,” former CIA Director John Brennan, WaPo:
The esteem with which I held the presidency was dealt a serious blow when Donald Trump took office. Almost immediately, I began to see a startling aberration from the remarkable, though human, presidents I had served. Mr. Trump’s lifelong preoccupation with aggrandizing himself seemed to intensify in office, and he quickly leveraged his 1600 Pennsylvania Ave. address and his Twitter handle to burnish his brand and misrepresent reality.
