The phrase "enough nominations" means that there have been a sufficient or required number of people or things suggested for an award or position. Full definition
It is now clear that I am unlikely to secure enough nominations and so I am withdrawing in the hope that we can at least secure a woman on the ballot paper. (conservativehome.blogs.com)
But in any event, he may not get enough nominations, due to your Party's leadership election rules - which are designed to exclude rather than include candidates. (conservativehome.blogs.com)
In response, one Labour MP told PoliticsHome: «Are they really saying he couldn't secure enough nominations from Labour MPs? (politicshome.com)