But is it really that simple?
Nobody can guarantee how many seats they’ll win in an election and there’s the possibility that he could end up with a hung parliament, which definitely won’t help matters.
What is a hung parliament?
A 'hung parliament' is when no one political party wins a majority of seats.
When that happens, the prime minister who was in power before the election remains in power and is given the first chance to try to form a government.
They can choose to form a minority government, or can enter into a coalition with another party.
If attempts to negotiate a coalition fail, they may decide to resign and recommend that the leader of the largest opposition party is invited to form a government.
Has there been a hung parliament in the UK before?
If the general election on December 12 brings a hung parliament, it won’t be the first time the UK has been in this situation.
In fact, the last time there was a Christmas general election, in 1923, the Conservative party led by Stanley Baldwin lost their majority and was unable to form a coalition.
The Labour party then took office and led the country as a minority government until October 1924.
Again, in 1974 the Conservative administration lost its majority. Edward Heath stayed Prime Minister as he tried to form a coalition but resigned just days later. A second general that year won Labour a majority of just three and by 1977-78 the Labour Government had to make a deal with the Liberal Party.
More recently, there was a hung parliament in the 2010 general election which led to a coalition between the Conservatives and Liberal Democrats.
In 2017 the Tory government lost its majority and Theresa May entered into a deal with the Democratic Unionist Party (DUP) on a supply and confidence basis.
Are we likely to have a hung parliament after the 2019 election?
Nobody can predict an election result and despite what polls seem to forecast, a shock result is always possible.
Back in 2017, Theresa May had hoped to secure a majority but instead found herself having to make a deal to stay in power.
Brexit Party leader Nigel Farage has predicted a hung parliament and said his own party could be key to any future government.
He told ITV: “It is likely, it is likely that we are going to have a hung parliament next time around so actually if the Brexit Party get a reasonable amount of people in there they could exert a great influence.
“Mrs May was kept in power by 10 DUP MPs.”
Labour leader Jeremy Corbyn has previously said if he fails to win an overall majority, he wouldn’t seek a coalition and would seek to govern as a minority government.
The Liberal Democrats have ruled out propping up a Labour government, with party leader Jo Swinson saying Jeremy Corbyn was “not fit for the job of prime minister”.
What will happen to Brexit if there is a hung parliament?
In short, we’re basically back where we started.
Without one party commanding a majority, it’s difficult to get legislation passed - and that includes any Brexit laws.