Key Democrats are signaling their rejection of Senate Minority Whip John Cornyn’s proposed amendment to the “Gang of Eight” immigration reform bill.

The Texas Republican on Wednesday unveiled a proposal he described as the “antidote” for Republican concerns that the bill is too weak on border security. Cornyn said his amendment would help the legislation garner the GOP support the legislation needs to clear the Senate and gain support in the House. But a Senate aide to a Democratic member of the “Gang of Eight” tells The Washington Examiner that Cornyn’s proposal is unacceptable.