Constitutional amendments need a 2/3 majority in the House and Senate to officially be proposed (except when proposed through a constitutional convention, which

Constitutional amendments need a 2/3 majority in the House and Senate to officially be proposed (except when proposed through a constitutional convention, which hasn't happened since the original constitution was written), and must be ratified by 3/4 of states to take effect. So, this won't happen unless there's suddenly a bi-partisan consensus that term limits are needed. (Also, congresspeople are unlikely to be willing to vote themselves out of a job.)