research, but it could also reduce the number of smokers. at least that s the intent. some say the law itself is flawed and big tobacco is fighting it tooth and nail. ahead of voting day california tv screens are full of ads. not for mitt romney or barack obama, but instead proposition 29. no on 29. and here s what s at stake. california voters will decide the fate of proposition 29 raising the tax by $1 on every pack of cigarettes. there s strem evidence from all overtime world that when you increase the tax on cigarettes, when you increase the tries, people smoke less. reporter: it would raise an estimated $735 million a year, and most of that money would go to cancer research. no on 29. according to that s a nonpartisan research firm, nearly $47 million has been spent to try to stop proposition 29. more than of that of that from big to be wroe. another $11 million from rj reynolds. we estimate that if prop 29 practiceses it will cost philip morris and rey