If Democrats wait four year to go back to the polls they will lose again. The next big battle will be in 2 years on the national level. Lots of states will elect new Governors next year. Only voting for the President is no way to be involved in a democracy.
On a National level, Democrats have to work to get the House back. If rank and file voting democrats are only focused on Presidential elections they are never get a head.
I know that the President has a lot of power. Voting for that office is the single most powerful vote that can be cast. Voters need to see that there is a whole system around him. Without both houses of congress held by his party the President would be much less powerful. I am worried that most of the LJ democrats I read do not see this.