Cynicism

Cynicism is a measurement of how much a voter group trusts the current government of a nation. High cynicism among a group has a negative effect on approval ratings.

Cynicism is raised by three things; flip flopping on policies (implementing them and than cancelling them soon afterwards), appealing to voters just before an election, and upsetting them immediately after one. The only way to reduce cynicism is to wait for it to fade without doing anything to raise it further.