Yes starting this past January, Social Security tax was lowered by 2 percent. Obama did this. Really stupid at a time when we are having problems with the program.
I’m pretty sure you are talking about a mere reduction in the paycheck-by-paycheck WITHHELD amount. The underlying SS tax rates that you must pay annually are not changed. (Because the amount withheld during the year is less, however, you must make up the difference when you file.)
What problem? First, it was a temporary reduction. Second, payroll taxes will cover payouts until 2017 without needing to tap the surplus which itself is good until 2037.