Perhaps the most important argument that can be made here is that globalization has drastically reduced the difference between a foreign corporation and an American one. Globalization has meant that the actions of foreign companies (and even governments) have a much greater impact on Americans. Therefore, they should be able to lobby Congress.
For example, Toyota is a Japanese company, but it employs thousands of people in the United States. In that sense, it is something of an American company. Because of this, it ought to have the same right to lobby Congress that Ford would have. Both companies employ Americans in the United States and therefore both should be able to push for Congress to do things that would promote their businesses.