Non-voting members of the United States House of Representatives (called either delegates or resident commissioner, in the case of Puerto Rico) are representatives of their territory in the House of Representatives, but they can't vote on legislation in the full House. However, they are able to take part in certain other House activities. Non-voting members may vote in a House committee they are a member in, and they can introduce legislation. There are currently six non-voting members: a delegate representing the federal district of Washington D.C., a resident commissioner representing Puerto Rico, and one delegate for each of the other four US Territories with people: American Samoa, Guam, the Northern Mariana Islands, District of Columbia, and the US Virgin Islands. A seventh delegate, representing the Cherokee Nation, has been formally proposed but not yet seated. Non-voting delegates are elected every two years. The Resident Commissioner of Puerto Rico is elected every four years.