so precarious

  1. Lalu Prasad’s political career will be at so precarious for his involvement in the fodder scam.
  2. Lalu Prasad’s political career will be at so precarious because of his involvement in the fodder scam.
    Are both sentences OK?
    Thanks.

Leave out ‘at’ . The second sentence (and only that one) will then be correct.

Beeesneees,
2. Lalu Prasad’s political career will be so precarious because of his involvement in the fodder scam.
The second is correct without ‘at’. OK.
What about the first?

  1. Lalu Prasad’s political career will be (at) so precarious for his involvement in the fodder scam.
    Is ‘at’ optional or not?
    Thanks.

There’s no point in worrying whether the ‘at’ should or should not be there (though it shouldn’t). ‘For’ should be ‘because of’.