Therefore it is perhaps unsurprising that Jeremy Corbyn is facing a crop of MPs who are saying they cannot stand in the next election.
After the surprise snap election, some of his MPs have announced they will not stand again.
It is expected more may step down in coming days.
Mr Blenkinsop's website crashed, seemingly because it couldn't handle the traffic, as he announced he could not stand in the 2017 election.
He said his issues with Jeremy Corbyn meant he could not stand for election, saying:
"I will not seeking re-election as the member of Parliament for Middlesbrough South and East Cleveland.
“I have made no secret about my significant and irreconcilable differences with the current Labour leadership. It is because of these differences I feel I cannot in good faith stand as the Labour candidate for Middlesbrough South and East Cleveland.
“Representing the people of Middlesbrough South and East Cleveland has been the proudest years of my life. I will do all I can in my time remaining as an MP to champion my constituents and the area that means so much to me, as I have been proud to do over the last 7 years.”
Former Home Secretary Alan Johnson announced he will not be standing for re-election.
He said he will be stepping down from his Hull West and Hessle seat rather than retiring in 2022 when he will be 71.
In a statement he said:
"As far as the constituency and the Party are concerned, no MP wants to put them through the anguish of a mid-term by-election, so for me the personal decision is whether to retire now or in 2022 when I’ll be into my 70s.
"I’ve decided that going now will give me the opportunity to do other things with my life and is therefore in the best interests of me and my family. I also think it’s best for the Party."
I don't intend to stand for re-election to Parliament: pic.twitter.com/LMwLH9L8t6— Iain Wright (@IainWrightMP) April 19, 2017
Iain Wright MP tweeted a statement on Wednesday morning.
He didn't mention Jeremy Corbyn in his statement, writing:
"I do not intend to stand again to become Member of Parliament for Hartlepool.
"It has been an enormous privilege to serve my home town in Parliament.
"I have now been an MP for nearly a third of my life.
"I would like to do other things and now is a good opportunity to do so.
"I would like to thank my constituents for giving me the honour of allowing me to be their Member of Parliament since 2004."
Pat Glass MP has announced she will not be standing this year.
@EmmaLewellBuck Thank you Emma but content there are people like you to pass the baton to x— Pat Glass (@PatGlassMP) 18 April 2017
She said: "I’ve already made my decision and that decision stands. It’s the right thing for me and my constituents."
Andrew Smith, the MP for Oxford East, is not standing for re-election.
A message to my constituents pic.twitter.com/LocKjz1JNT— Andrew Smith (@AndrewSmithMP) April 19, 2017
He wrote: "I thank constituents for your 30 years of support. It has been a huge privilege to serve as MP for Oxford East, and we have achieved so much together.
"This election is for a Parliament which is likely to run until 2022, when I would be over 71, so I think it is now time for someone else to take forward the work of serving local people as your MP.
"I will therefore not be a candidate in the election".
Gisela Stuart quit on Wednesday evening.
The MP for Birmingham Edgbaston, told her local party she is standing down after 20 years in the House of Commons.
"After 22 years of campaigning and 20 years of having had the privilege of being the MP for this diverse, forever surprising and wonderful marginal seat I know when it is time to stand down and pass on the baton.
"The news yesterday of the early General Election has come as a shock to all of us. It means that we have to take decisions now which none of us thought we'd have to take 48 hours ago.
"I wanted you to hear from me that I have decided not to contest the Birmingham Edgbaston constituency at the general election in June.
"Together we have done amazing things; things we never expected when I became the first 'Labour gain' of the Labour 1997 landslide as well as the first ever Labour MP for Bartley Green, Edgbaston, Harborne and Quinton.
"We won local battles, brought people together, challenged established assumptions about voters (and sometimes our own) and won elections against Tories that we didn't think were possible. But together we did it . We are Labour and our values are Labour.
"Whomever is selected as the Labour candidate will have my full backing. I will be with them and you not just in spirit but on the campaign trail. We will fight, as we always do, for every Labour vote."
Gisela Stuart MP refuses to endorse her own leader Jeremy Corbyn for Prime Minister on #R4Today, suggests PM better to deliver Brexit!— Vincent McAviney (@Vinny_LBC) April 19, 2017
On the Radio 4 Today Programme on Wednesday morning, Gisela Stuart said she couldn't support Jeremy Corbyn and that Prime Minister Theresa May is better equipped to deliver Brexit.
She also said it "looks like Labour will not win the election".
The MP for Slough quit because she has been "bored by political struggles over personalities".
She said: " I have been depressed by the way the fantastic capacity in the voluntary sector is being run down by lack of funds or poor leadership. I have been bored by political squabbles over personalities and I know I don’t still have the passion which has driven my politics for 20 years."
Andy Burnham MP is not contesting. He is now the Mayor of Manchester.
He said: "At my age and after 11 years in Parliament, I have decided that it is time to step down and support a new Labour candidate for the city. As a proud Wulfrunian, it has been a privilege to serve the people of Wolverhampton as a Labour Member of Parliament."
The Shadow Scottish Secretary will not be standing for re-election.
He said: "I have reluctantly decided that for reasons of health, age and my family’s needs, I cannot commit to another five years in Parliament.
“To that end I will stand down but I will be campaigning hard with our new candidate and the positive policy platform put forward by our leader, Jeremy Corbyn, and the whole Labour movement.”
The Lewisham West and Penge MP announced on Thursday he would be stepping down. He was returned to his south London seat with a majority of 12,714, with an increased share of the vote, at the last general election.
Who might not stand?
The Barrow-in-Furness MP has said he cannot vote for Jeremy Corbyn to be Prime Minister.
In a video message to constituents, he said:
"I intend to seek re-nomination from my local Labour and Co-operative parties to be their official candidate.
"But I will not countenance ever voting to make Jeremy Corbyn Britain's Prime Minister. I realise that Jeremy has been elected and then re-elected as the leader of my party, but my first duty is to you, my constituents.
"Jeremy's opposition to the Trident renewal programme is lifelong and is well-known. But more than that, I cannot countenance endorsing him for a role which I think even he, although he may say differently in front of the cameras, does not think he is fit to carry out.
"My party, locally and nationally, will need to decide how to treat my desire for re-selection in these circumstances. There is still of course time for Jeremy to stand down rather than lead Labour to defeat, but I promised when I first asked you to vote for me that I would put Furness first and that means in these circumstances doing what is right rather than what is easy."
Many have questioned whether he can stand to be a Member of Parliament under Jeremy Corbyn after saying this.
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