Right now, Huffington Post Pollster averages Trump's national lead in a match against Hillary Clinton as 37.4%.
I used the same metric from HuffPost Pollster for the 2012 election and from Pollster.com (before it merged with HuffPost) for the 2008 election.
In the first quarter of 2012, Republican Mitt Romney averaged about 43% of national popular vote.
In the first quarter of 2008, Republican John McCain averaged about 45% of the national popular vote.
Again, Trump right now: 37%.
I used the same metric from HuffPost Pollster for the 2012 election and from Pollster.com (before it merged with HuffPost) for the 2008 election.
In the first quarter of 2012, Republican Mitt Romney averaged about 43% of national popular vote.
In the first quarter of 2008, Republican John McCain averaged about 45% of the national popular vote.
Again, Trump right now: 37%.