The word is that the party is working with Youthsight, who specialise in youth polling, and has been tracking student constituencies over the last two years.
Cardiff University Students Union (CUSU) has been using the slogan "24,000 students, one constituency - you do the maths" as part of its campaign to encourage members to turn out to vote.
He raised the issue in a shadow cabinet meeting more than a decade ago after being berated about it by an A-level student in his constituency.
The story has been circulating for months now, faster and frothier with each rotation, as a detachment of journalistic shock troops ransack every inconsequential student group or constituency party, looking for someone, anyone, with negative things to say about the Jews.
When students – the very constituency Clegg had gone out of his way to court – marched through Westminster and then stormed Tory HQ in protest, he was genuinely shaken.
The Liberal Democrat MP Don Foster today confronted angry students outside his constituency office in Bath and said he would not make up his mind how he would vote on tuition fees until a few hours before the vote.
Assuming there has been a three-way split, they will, of course, be doing so safe in the knowledge that the measure will pass, and that they won't be damaging the coalition, only because some of their colleagues – including those, like Clegg himself, who have considerable numbers of students in their constituency – are prepared to go into the opposite lobby.
Among those coalition MPs most at risk are the education secretary, Nicky Morgan, who faces a tough fight to hang on to her student-heavy Loughborough constituency, as well as prominent Lib Dems including the justice minister, Simon Hughes, in Bermondsey and Southwark, and the climate secretary, Ed Davey, in Kingston and Surbiton.
The seat has one of the highest student populations of any constituency in the country – a demographic Mr Clegg angered in 2010 by reversing his policy to abolish tuition fees and instead trebling them to £9,000 a year.
With the election looming, none of the candidates need reminding about the importance of securing student votes in a constituency boasting two universities.
