The political issue of SOFAs is complicated by the fact that many host countries have mixed feelings about foreign bases on their soil, and demands to renegotiate the SOFA are often combined with calls for foreign troops to leave entirely. Issues of different national customs can arise – while the U.S. and host countries generally agree on what constitutes a crime, many U.S. observers feel that host country justice systems grant a much weaker set of protections to the accused than the U.S. and that the host country's courts can be subject to popular pressure to deliver a guilty verdict; furthermore, that American servicemembers ordered to a foreign posting should not be forced to give up the rights they are afforded under the Bill of Rights. On the other hand, host country observers, having no local counterpart to the Bill of Rights, often feel that this is an irrelevant excuse for demanding special treatment, and resembles the extraterritorial agreements demanded by Western countries during colonialism.