Some candidates have also concluded that they are better off without the party.
The investigators have also concluded that four out of five of the sites were chosen because of a Jewish connection.
Several agencies have also concluded that the risk of hearing loss doubles with every three-decibel increase, not five.
British and Swiss national health departments have also concluded in the past that homeopathy is not effective enough to be funded by the state.
Studies have also concluded that adolescents who are tried as adults are more likely to go on to commit other crimes.
Measuring the twinkle of starlight, astronomers say they finally have an accurate measurement of Pluto's large moon and have also concluded that it is unlikely to have an atmosphere.
American spy agencies have also concluded that officers in Pakistan's powerful Directorate for Inter-Services ISIelligence, or ISI, which has long maintained ties to militants in the tribal areas, helped carry out the embassy bombing.
But many centrist and conservative Democrats have also concluded that gun control has become their party's albatross, costing it crucial votes among white, male, rural voters in key states across the South and Midwest.
Obama and Senate leaders have also concluded that time is too short to work on a package of significant cuts to federal health and retirement programs, the top priority of many Republicans.
A host of other respected experts have also concluded that life imprisonment is a far more practical form of retribution, because the death penalty process is too expensive, too time-consuming and unfairly applied.
Other studies, from the Center for American Progress on the left to the Cato Institute on the libertarian right, have also concluded that the long-term economic effect is positive and substantial.
