How about "was this the week"? This is usually followed by "x won/lost the next election". So here are a few hits -
I put the prevalence of "was this the week" down to political commentators desire to be seen to highlight the real turning points, even before their consequences have fully played out. So these are a bit like those "what level will the FTSE100 be at next year" bits in the personal finance pages.
What I really cannot excuse, however, is "champagne corks popping". And they seem to pop an awful lot -
The High Court's award of an injunction against the RMT's planned Strike Action will have champagne corks popping in Downing Street.
What I really don't like about this one is the idea that trigger-happy politicos are just waiting pop the corks off champagne over minor political advantages. But maybe that is just what Tories are actually like...
Finally, some people are still willing to use "speech of his/her political life". Please stop. Now.
I'm just waiting to be able to say that this was the week that X won the election after giving the speech of their political life that left champagne corks popping in Number 10.