Politician: About 4 years ago, when our party came into power, it was committed to fighting inflation and successfully reduced the increase of the consumer price index (CPI) from 4% at the time to 1.5% now. The CPI rose by more than 4% during the previous four years of the opposition party's administration. 
under the leadership of our party, the prices of commodities are getting lower and lower.
No mention was made of the possibility that the opposition party implemented a policy to combat inflation, but the effects of that policy would take some time to show up.