Schumer press release regarding decision. He is basically reiterating what the repubs have already stated.
http://www.schumer.senate.gov/newsroom/press-releases/my-position-on-the-iran-deal
"Even more troubling is the fact that the U.S. cannot demand inspections unilaterally."
"Supporters argue that after ten years, a future President would be in no weaker a position than we are today to prevent Iran from racing to the bomb. That argument discounts the current sanctions regime. After fifteen years of relief from sanctions, Iran would be stronger financially and better able to advance a robust nuclear program. Even more importantly, the agreement would allow Iran, after ten to fifteen years, to be a nuclear threshold state with the blessing of the world community. Iran would have a green light to be as close, if not closer to possessing a nuclear weapon than it is today. And the ability to thwart Iran if it is intent on becoming a nuclear power would have less moral and economic force.
If Iran’s true intent is to get a nuclear weapon, under this agreement, it must simply exercise patience. After ten years, it can be very close to achieving that goal, and, unlike its current unsanctioned pursuit of a nuclear weapon, Iran’s nuclear program will be codified in an agreement signed by the United States and other nations. To me, after ten years, if Iran is the same nation as it is today, we will be worse off with this agreement than without it.
In addition, we must consider the non-nuclear elements of the agreement. This aspect of the deal gives me the most pause. For years, Iran has used military force and terrorism to expand its influence in the Middle East, actively supporting military or terrorist actions in Israel, Syria, Lebanon, Yemen, Iraq, and Gaza. That is why the U.S. has labeled Iran as one of only three nations in the world who are “state sponsors of terrorism.” Under this agreement, Iran would receive at least $50 billion dollars in the near future and would undoubtedly use some of that money to redouble its efforts to create even more trouble in the Middle East, and, perhaps, beyond."