First of all this is a reaction to polls giving the ruling party a significant drop of acceptance within the young people, who have always been the strongest support group for them.
Second thing, let's don't be naive. Tusk knows very well that what was there to sign in Japan, has been signed. It's to late to stop certain things, it's all cold thinking about the popularity and the party has to be punished in the elections anyway... although the alternative is still terrible...
Wow, a country with a ruling party whose strongest support group is young people. Compared to a lot of other countries, I'd say there's hope for Poland.
The left? Lots of scandals which they tried to deny/cover. Lost trust, their new leader perceived as sleazy. The "right"? They cater to religious old people and their fears of change. PSL? Farmers' & big food interests. Palikot? He is the one catering to the young (reduce influence of the church, legalize MJ) but IMHO he's trying too hard to be perceived as trustworthy.
Second thing, let's don't be naive. Tusk knows very well that what was there to sign in Japan, has been signed. It's to late to stop certain things, it's all cold thinking about the popularity and the party has to be punished in the elections anyway... although the alternative is still terrible...