There is a sort of problem in newspapers and in politics --slander- lashon hara. And lashon hara is also on truth unless you have the seven conditions of the Hafez Haim. so while at least for reading newspapers there is some sort of permission because it is supposed tobe true and for benefit, still for politics this does not seem to apply since people commonly say what they themselves know to be false --just in order to gain advantage over the other side.