Does the Electoral College help facilitate a winner-take-all approach to presidential campaigns?

The Electoral College certainly does help to create a
winner take all approach to presidential campaigns in each state of the Union.  This is
because the winner of the voting in each state takes all of that state's
votes.

The main reason why this matters is that candidates
tend to take the attitude that only states whose results are in question are important. 
If a candidate is sure that he (or eventually she) will win a state, he will not bother
to campaign there.  There will be no benefit to going to such a state because winning
more than a plurality of the vote is not valuable.  If the candidate knows he will win
the state by, for example, 52% to 48%, there will be no point in campaigning there in an
attempt to get to 55%.

In this way, the Electoral College
does promote a winner take all approach to presidential
campaigns.