Who did the colossal foulup at CDC?

We've all been told that CDC insisted on developing their own test for coronavirus and that their product failed in use. I want to know a) who made this colossal blunder and b) how they have taken responsibility for the resulting failure of US efforts to contain Covid-19. If the government is unwilling to say, don't you think the ultimate answer has to be "Trump"?? [And that we should, therefore, vote him out of office for refusing to be responsible.]