Please read the whole article. Here's a part.
https://thebulwark.com/putting-the-watchdogs-to-sleep/
"Had Trump fired all of the inspectors general in a single night, it might have aroused more outrage. With time and repetition, though, the president has normalized the task of disposing of those who raise legal and ethical concerns about his administration’s actions.
Over the last two months, Trump has purged five inspectors general. He fired the IG responsible for kickstarting his impeachment; he fired a pair of IGs tasked with monitoring the administration’s handling of the coronavirus; he fired a State Department IG who was reportedly reviewing Secretary Pompeo’s abuse of taxpayer resources (and arms sales to Saudi Arabia); and he fired the Department of Transportation IG who was looking into whether Secretary Elaine Chao—who is married Sen. Mitch McConnell—had given preferential treatment to the state her husband represents.
You know. Because Donald Trump came to Washington to drain the swamp."