Well in the UK, we are now into the last 72 hours of an election that will determine either the next five years of these islands or the next four months, before we do it all again. There's been a lull in the last 24 hours -- aside from Ed Miliband's bizarre monument to bad political ideas -- before what is likely one last sting, one last policy punch or giveaway. I'm not sure what it can be from either side: so much has been promised to swinging voters that short of promising to come round and babysit for couples on date night, I'm not sure what remains. Indeed, the Tories may well promise something on childcare -- an earlier refusal to rule out cuts to child tax credit may have been a double-bluff.