Well now we know what they call it your country. In the U.S.A. we don't use a term like that, but I guess that is like some slang for early voting, where the polls show a favor for Trump. Except we haven't had early voting, but early polls do show Trump winning.
All of this is why Mueller needs to testify before congress. Good thing we have Dems in office. Because that would never happen if the GOP ran the House.
I don't think he's going to go beyond his "findings" on the Trump-Russia "collusion" matter so you are almost assuredly going to be disappointed. If there are any "bombshells" that come out of his testimony, it's much more likely to be ass covering than evidentiary.