Tim Farron has confirmed he will run to be the new Liberal Democrat leader.
Mr Farron joins former health minister Norman Lamb as the contenders to replace Nick Clegg following the party's disastrous general election results.
Norman Lamb said he has "never shrunk away from a challenge" as he announced he will run for the leadership of the Liberal Democrats.
The Norfolk North M, who held his seat with a reduced majority of 4,043, said he would put "body and soul" into the job.
Speaking to ITV News Anglia, Mr Lamb said: "I think we've got a lot of learning to do and we've got to understand where we went wrong.
"..I suspect in the next five years, with the Conservatives on their own, people might start to see what a good restraining influence we were and also some of the very progressive policies that we actually achieved in government."
He is the first to declare his bid in a race expected to be dominated by him and former party president Tim Farron, who has expressed anger that the election was fought "on the politics of fear".
The rapper told his 859,000 followers on Twitter that he was a fan of the North Norfolk MP.
Nick Clegg has resigned as leadrer of the Liberal Democrats after the party suffered their worst General Election collapse in years.