Delia, thanks for your comments - I hadn't actually realised that the FL could "lobby" in the way you described - like you I am uncomfortable with that. My view is - you want to influence Congress, then stand! Plenty of women do.
Like many others, I loathe the parading of "family" credentials. I have no interest in the domestic life of politicians (provided it is legal and so on), or unless it is in direct contradiction with a policy they are promoting or could be seen to be dishonest (like claiming accommodation from your landlord who is really your partner). The only exception I make for this is the PM who does have a role as a national ambassador and therefore if they have a spouse, it is reasonable to expect the spouse to attend a certain amount of events e.g. Olympic games, Remembrance Sunday etc.
Actually, there are lots of childless politicians - which is great, since around 30% of women now don't have kids, and am not sure of figures for men. Also there are plenty of women voters who do have kids but they have grown up so may not be so involved/concerned with issues such as Sure Start etc. Some examples of childless politicians include Peter Mandelson, Margaret Beckett, Teresa May, Anne Widdecombe, William Hague, Michael Portillo - I'm sure there are loads more. These examples have been Cabinet members, leaders of their Parties, Deputy PM's so it is certainly not a barrier to high office. As someone who is childless, I do get quite cross at times when there is an assumption that women's issues in politics are exclusively about maternity issues, but of course that is a whole other thread! Woman's hour on R4 is particularly bad for this.