Do presidential campaigns differ from campaigns for other offices that are less visible, powerful, and prestigious?

Presidential campaigns in the US absolutely differ from
campaigns for other offices.  There are many types of differences.  Here are three major
differences.

• Presidential campaigns are much
  longer.  It is now about one year and eight months until the next presidential
  election.  It is almost one year until the primaries start.  Even so, we already have a
  pretty good idea as to who will run for the Republican nomination and people have been
  preparing their bids for at least a year
  now.


• Presidential campaigns cost much more.  Because
  presidential campaigns are longer and must be national, the amount of money that they
  spend is many times more than that spent for even the most expensive of other
  races.


• Presidential campaigns are much more scrutinized
  by the media.  The presidential campaign is big news everywhere.  Presidential
  candidates' every move and every word is raked over by everyone in the news media and
  the blogosphere.  By contrast, a senatorial race may attract some amount of coverage in
  the local papers and a House race may not even get that much
  attention.

These are three of the major
differences between presidential campaigns and others.