While the Lib Dems have much to lose from an early end to the coalition, the Tories can easily see the appeal of trying to govern alone.
The PM insists that the date of the referendum "isn't going to change". But will Tory MPs allow him to keep his word?
Tory opponents of the bill outnumber supporters as just 117 Conservative MPs vote in favour.
The GOP is embracing immigration reform and is under grassroots pressure to reverse its opposition to gay marriage.
After gaining 2,000 members this month, UKIP now has 27,517 and expects to pass the 30,000 mark once the backlog is cleared.
The real obstacle is not an absence of applicable law, but the woeful underfunding of fraud investigation and prosecution.
Ed Miliband advised Labour MPs to vote against the amendment, rather than abstain, after Tory whips warned they could be defeated.
Support for UKIP surges to a record high of 22 per cent in the latest Survation poll, with the Tories down five points to 24 per cent.
Instead of playing to the gallery, the Education Secretary needs to learn from what works.
The party tables its own rival amendment to establish a consultation on introducing civil partnerships for heterosexual couples.