I understand this cannot be done without the approval of Congress.

The Democrats there pretty much nix EVERYTHING that Trump wants.

So, a good litmus test is seeing what kind of democrat support in Congress supports this move.

If the democrats support it, the Marxists do too, then it is bad for our country.

Worth a try, though with the common use of magnets today, using steel may not be a good idea. If a penny became magnetized it could stick inside a coin machine.

I know of no machines using pennies, do you?

Self checkout machines. Coin sorters at banks.

If so, the chances of counterfeiting 1 cent is almost nothing.

I likewise don't see anything sinister about eliminating the penny.  It likely affects us in sales tax states like Washington more.  Stores are already putting up signs for cash customers who don't have exact change (i.e. pennies) saying at the amount due will be rounded up to the nearest nickel.  I remember the $2.00 Jefferson bill and the $1.00 Susan B. Anthony coin, these are sill in circulation, just not very common.  Shops complained that their cash registers didn't have a slot for the $2.00 bill nor a compartment for the $1.00 coin.  The latter was nearly the size of a quarter, which caused confusion.
  
I wonder why they don't replace the Kennedy 50 cent piece (still in circulation, just not commonly encountered) with a dollar coin that size, and the $1.00 Washington bill with the $2.00 Jefferson bill.  Current cash registers would have compartments for those.  Churches and other charity collections where people put in a dollar bill may see their collections nearly double.

I give nearly zero credence to "opinion" from artificial intelligence.  If there isn't a citation of a verifiable data source the information is not to be trusted in my view.

Some people find card or digital payment convenient, others follow incentives, still others stick with habit.  For example, I still prefer to pay bills and contributions by check sent through postal mail.  However, some merchants reduce my bill if I sign up for automatic payment from my bank account and I sometimes take advantage of that.  I often use an Amtrak Mastercard (balance paid off every month) to build up points for free train travel, rather than using cash or writing a check.  My bank pays interest on my checking account balance each month I have at least 15 debit card transactions and I make sure that I do.  Increasingly merchants aren't accepting checks because their validity can't be verified at the time of a purchase.  On the other hand, I may boycott a merchant who doesn't give me the option of paying by cash.  "Back in the day" if one was at a parking meter or a pay-for-parking lot and didn't have cash or exact change they may have to over pay what was owed or risk car impoundment for not paying.  Debit/Credit carts and digital technology eliminate that problem.  Of course, the technology costs money and while the cost may be hidden one will pay for it through the cost of the service.

Debit and credit card transactions cost the payee a service fee.  My dentist a few months ago said there would be a 3% surcharge for paying by debit or credit card ... I returned to writing him a check.  Some shops won't accept card payment for sales under $5.00, or they add a surcharge to those transactions.

The bottom line is that there will never be a "perfect system" this side of the Second Coming, but my BS meter goes out of range when some say we will be forced into a "cash less economy". 

I give nearly zero credence to "opinion" from artificial intelligence.

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A lot better than this forum!

Or perhaps no better than this forum.  I graduated from high school in 1969 and with a B.Sci. in Animal Science in 1973.  I was on the debate team in high school and whenever we make a "statement of fact" in support of our argument we had to provide a citation of a verifiable source.  All research papers had to copiously annotated.  Citations of fact needed to be from verifiable sources.  With scientific subject matter these sources typically needed to be peer reviewed journal articles.  As I'm about to hit the three-quarter century mark I'm not seeing a need to lower my standards.