Michael Gove, easily the Tories' most trustworthy media performer, has decided to launch into Clegg's more "eccentric" policies.
In his selection of these policies, he has landed upon one that Alan Johnson, easily Labour's most trustworthy media performer, targeted last night. Johnson and Gove agree on what's eccentric about Liberal Democrat policy.
They're both going after the Liberal Democrats' policy of granting an earned amnesty to long-term resident illegal migrants.
Clearly their focus groups have registered this is not a vote-winner. Presumably around Britain we're all hearing plenty about this on the doorstep.
And doubtless Cameron would like to use this policy to attack Clegg.
Except that he has one giant, blond problem.
The most powerful Conservative in the country is a passionate advocate of the policy. Bojo, alas, is not in a position to implement it; but any attack that Cameron launches on Clegg in relation to this is an attack on a Tory more popular and powerful (at least for now) than him.
It's also an attack on Anthony Browne, Boris' head of policy, who some people thought would be a major player in No 10 if Cameron got in.
Browne made the case in a piece I commissioned for The Independent.
On reading that piece, Tim Montgomerie came round to supporting an amnesty too.
Oh and, in case you didn't know, I support an amnesty as well.