He is depressing because I have not met anyone who supports him.
He is depressing because his primary claim to nomination is recently developed rhetoric
He is depressing because his voting record has little in common with his current positions
He is depressing because she will do whatever it takes to win (to include spout spin about why he's taking public financing)
He is depressing because I have no idea what he actually believes in anymore.
He is depressing because I believe he would turn his back what beliefs he has in order to win.
He is depressing because he would follow Bush’s lead on foreign policy for fear of being "weak".
He is depressing because nothing will organize higher turnout among the Republican base than his nomination.
He is depressing because he's always managed to feather his nest quite substantially and then pursue more, more, more money
He is depressing because if nominated, we will hear scorched-earth rhetoric that will turn off large percentages of voters.
He is depressing because I live in a state with such a late primary that my primary vote will not matter.
He is depressing because if he wins it will be another decade before we can have a President that is a step forward rather than a step into the past.
He is depressing because I believe he would continue the Unitary Executive strategies of Bush/Cheney.
He is depressing because she would likely continue to reinvent himself as necessary. Nice vote for the Bankruptcy Bill.
He is depressing because Republicans will proclaim how he is intrinsically evil no matter how far to he shifts his policies to the right.
He is depressing because most independents will believe them.
He is depressing because most of this is completely outside his control.
He is depressing because if he wins it will be too narrowly to give anything approaching a mandate.
He is depressing because he symbolizes everything that is wrong with our political process, only with better policies.
This is my opinion.
Almost any of the other Democratic candidates would be better. Your opinions may vary.
My only hope is that we avoid the train wreck before it becomes "inevitable".
He might win. He might even manage to be an OK, but ineffective President.
But he would certainly be a depressing one.