There are bound to be such surveys, and the trick is to identify them and punish its operators. Some gullible voters will be hoodwinked, but they re stupid enough to be hoodwinked in any event. Unthinking voters are no excuse for banning all surveys. Benjamin Franklin remarked that if the people misuse their right to vote, the remedy is not to deprive them of it but to teach them in its proper uses. One of the lessons the responsible voter should learn is how to distinguish between honest surveys and those that deliberately mislead.
Some unscrupulous newspapers can make their forecasts in favor of their own candidates.
This is done in the form of news reports and not as supposed survey results. Let us not forget what Justice Holmes said, that freedom of expression is not only for the thought that agrees with us but also for the thought that we detest. Every medium of information is intended to influence the electorate for good or evil. Posters, television and radio spots, rallies, parades, programs, speeches, and other means of communication aimed at glorifying even the most worthless candidates are protected by the Constitution. So too is the survey although, in its particular case, persuasion is not the main objective.