Strictly for fun
Since the year 1900, the taller nominee has won the Oval Office most of the time.
http://en.wikipedia.org/wiki/Heights_of_presidents_and_presidential_candidates_of_the_United_States
This is one of the reasons that, in televised Presidential debates, the bipartisan commission decided that the only time viewers should get to see the candidates side by side is when they shake hands. Maybe someday, they'll even do away with that.
Of course, only men have been nominees so far. We don't know what will happen to the statistic when women become nominees.
Although he did not have to worry about comparative height, President Washington was 6'2''.
http://www.nytimes.com/1982/04/15/garden/american-men-of-1776-said-to-have-stood-tall.html
President Lincoln was 6'4". Washington and Lincoln were the two Presidents whose birthdays the US used to celebrate each year with a national holiday, before Presidents' Day came along.
Analysis of the height issue.
http://www.researchgate.net/profile/Simon_Verhulst/publication/232274709_Tall_claims_Sense_and_nonsense_about_the_importance_of_height_of_US_presidents/links/09e4150801216830ea000000.pdf
Presidents by height and weight. http://www.presidenstory.com/stat_tal.php
(Speaking of Presidential weight, President Taft famously sat in a bathtub full of water, causing him, the water and the tub to break through the bathroom floor.)
Again, this post is strictly for fun. Don't bet the deed to the farm based on height.