Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) on Thursday called the resignation of the Office of Government Ethics Director's Walter Shaub "deeply unnerving."

"Walter Shaub's announcement that he is resigning as the head of the Office of Government Ethics (OGE) is deeply unnerving," Warren said in a statement.

ADVERTISEMENT

Warren praised Shaub for putting the "law first" while dealing with "ethics problems at every level of the Trump administration."

She said Shaub's OGE replacement, who needs Senate confirmation for the post, must follow Shaub's lead and stand up to government officials who "ignore ethics rules."

"The Senate is responsible for confirming the new head of this post-Watergate ethics watchdog, and every senator — regardless of party — should insist upon a tough, fiercely independent replacement who will follow Shaub's example of enforcing the law, even in the face of relentless pressure from the Trump Administration to ignore ethics rules," the Massachusetts lawmaker continued.

Shaub, who had previously clashed with President Trump over his continued ties to his business interests, submitted his resignation earlier Thursday.

Shaub will be leaving the independent agency almost six months before his term expires with his last day being July 19, according to a letter Shaub wrote to Trump that he posted on his Twitter account.

“The great privilege and honor of my career has been to lead OGE’s staff and the community of ethics officials in the federal executive branch,” Shaub wrote in the letter. “They are committed to protecting the principle that public service is a public trust, requiring employees to place loyalty to the Constitution, the laws, and ethical principals above private gain."

Shaub has served at OGE under both Democratic and Republican administrations.