Joe Biden has a historically large lead over President Donald Trump in the polls, including in the critical electoral college vote, but that could narrow closer to the election.The slide in Trump’s approval rating was most noticeable among senior citizens and he has not led in a single major poll so far this year, though it should be noted that polls have proved unreliable in the past few elections. To put Biden’s lead in perspective, no prior candidate or President has seen a lead this large at this point of the race. However, Trump still holds onto slightly favourable ratings on the economy. A game changer could be the Democratic party taking control of the Senate, which appared unlikely early this year.