Jeremy Corbyn will ask the country not to count him out of winning the general election as he says Labour is the "party that will put the interests of the majority first".
The next general election had been expected in 2020, but the Fixed Term Parliaments Act allows for one to be held earlier if it has the support of two-thirds of MPs.
Tajani last week said his priority for Brexit was "defending the rights of our citizens" affected by the UK's decision to withdraw from the EU.
The Tories will, however, face pressure from enthusiastic EU-backing Lib Dems who will seek to re-gain seats that they lost in the 2015 General Election.
The British Prime Minister accused the opposition parties of stopping Britain from moving forward and frustrating Brexit negotiations.
British Prime Minister Theresa May said on Friday (April 21) that she was not taking anything for granted as she gears up for a snap election in June in which polls suggest her Conservative party is heading for a landslide victory.
Douglas Carswell, who defected from the Conservatives to Ukip before leaving that party to become an Independent, said on Thursday that he will not contest his seat in Clacton.
"They will have a choice between a Conservative party, which always has been, is, and will continue to be, a party that believes in lower taxes", May outlined, or a Labour party "whose natural instinct is always to raise taxes".
Another general election in the United Kingdom wasn't scheduled until 2020, hence the need for a Parliamentary vote.
London and Brussels have been at odds on whether talks on the divorce arrangements, including costs, should take place at the same time as negotiations for a trade deal between post-Brexit Britain and the EU.
"Will the election of more Tory MPs give Theresa May a greater chance of securing a better Brexit deal?"
The last parliamentary session will be held on May 2 before campaigning begins.
Good start The row over a second Brexit referendum overshadowed a good start for the Labour leader's campaign with a passionate speech to party activists in London which cast the election as a battle between the establishment and the people.
But the source said: "Any suggestion we are going to change our approach to the inclusion of overseas students in the migration statistics is plain wrong". "What she doesn't have is a Parliament that would vote for Brexit at any cost".
In an interview with the Guardian, Mr Tajani indicated that the Article 50 process could be halted if the Government wanted after the election.