Central Suffolk and North Ipswich MP Dr Dan Poulter is backing Andrea Leadsom to be the next Conservative leader and Prime Minister.
Dr Poulter had initially pledged his support to Boris Johnson, but he pulled out of the race on Thursday.
Dr Poulter tweeted earlier today: “Having listened carefully to the views of residents in Suffolk at the weekend, I have decided to support @andrealeadsom for next PM.”
He added that he had “always been impressed” with her commitment to improving support for young mums and fixing the social care system.
Mrs Leadsom, MP for South Northamptonshire, faces competition from Theresa May, Michael Gove, Liam Fox and Stephen Crabb. David Cameron says he will step down as PM by the autumn.