Secret Service director resigns following Trump assassination attempt

The video covers the resignation of Secret Service Director Kimberly Cheadle following intense scrutiny from lawmakers after a failed assassination attempt on former President Donald Trump. Cheadle faced bipartisan criticism during a lengthy hearing, leading to calls for her resignation. Despite initially resisting, she stepped down ahead of an impeachment effort. The video also discusses the absence of key officials at a subsequent hearing and speculates on who President Biden might appoint as the interim leader of the Secret Service.

Who was the representative that asked Cheadle if she wanted to resign?

What was the nature of the impeachment effort mentioned in the text?