Bipartisan support for banning U.S. senators and representatives from buying and selling stocks while they're in office is picking up momentum. President Trump recently stated that he would "absolutely" sign legislation to that end if it comes to his desk. If you're hoping to get great investing ideas from Capitol Hill, you might not have much time left to do so. However, it's not too late. Members of Congress have been buying four Warren Buffett stocks recently. Should you buy these stocks, too?1. AmazonRe ...