Less than one day after U.K. Prime Minister Theresa May's Cabinet  approved a draft Brexit  agreement, her Brexit secretary has abruptly resigned in protest.

Dominic Raab said Thursday that he couldn't support the agreement, writing in  his resignation letter , "I cannot reconcile the terms of the proposed deal with the promises we made to the country in our manifesto at the last election.

This is, at its heart, a matter of public trust." Raab has only served as Brexit secretary since July.

He replaced David Davis, who  similarly resigned in protest  over a Brexit proposal to use a "common rulebook" to allow the free trade of goods between the U.K. and the EU.

Work and Pensions Secretary Esther McVey  swiftly followed Raab  out the door Thursday — making her the second Cabinet minister to quit over the withdrawal agreement.

But it's not just senior officials who are resigning —  two junior ministers  also quit.

It's unclear if all these resignations will affect the terms of the Brexit deal.

May is scheduled to lay out the agreement to the House of Commons Thursday.

And EU member states are  expected to meet  Nov.

25 in Brussels to finalize the deal.

Additional reporting from  Newsy affiliate CNN .