What do you think of a required national ID for all American citizens?

While this could have possible benefits (voter fraud, fraud in general), I think this opens up a slippery slope. Could a police officer demand ID without cause? Would I have to use this every time when doing purchases of high value? What databases would this card link to and what protections will I have to prevent identity theft? These are a few things I would like to see prior to going for a national ID card.

I believe that it is not unreasonable to ask for an ID to be given in order to vote. To register to vote there are basic requirements (1) be at least 18 years of age at the time of the next election, (2) being a U.S. citizen and (3) be a resident of the jurisdiction where the individual is registering. How is anyone going to show that they meet the requirements? They have to provide documentation. If they are providing the documentation. This same documentation could be used to receive an ID at the voting site and or during registration. We already have in place a system called the "Passport Card" The U.S. Passport Card can be used to enter the United States from Canada, Mexico, the Caribbean, and Bermuda at land border crossings or sea ports-of-entry and is more convenient and less expensive than a passport book. I don't agree with the premise that the poor and the elderly should be exempt from having an ID. The majority must have already had to produce documentation or IDs to receive any number of social programs.

I'm against it. I don't have any problem with requiring a voter ID card for people who want to vote, or a driver's license for people who want to drive -- but I don't think anyone should be required to have an ID. I can't find any specific justification in the Constitution for it, therefore I can't find that it is a power the federal government possesses.