On the heels of the rollicking debate between Vice President Joe Biden and Rep. Paul Ryan last week, Americans are rightly expecting President Obama to play the role of fact checker in chief Tuesday night.

Even Biden -- who didn't miss many opportunities to put fact-checkers out of work -- failed to push back on this doozy of a question from moderator Martha Raddatz on Social Security and Medicare:

"Let's talk about Medicare and entitlements. Both Medicare and Social Security are going broke and taking a larger share of the budget in the process. Will benefits for Americans under these programs have to change for the programs to survive?"

Obama's answer on Social Security two weeks ago left something to be desired. If he gets a similar question Tuesday night, I hope he one-ups his vice president and pushes back on this dangerous mindset.

The fact is: Social Security is not going broke.

The program is fully funded for the next two decades, and could pay out 75% of benefits after that. Medicare's death has also been greatly exaggerated -- the program will still be able to meet 88% of its obligations until 2085.