Bloomberg initially supported the Manhattan trial decision, declaring: "It is fitting that 9/11 suspects face justice near the World Trade Center site, where so many New Yorkers were murdered."
But the mayor this week reversed from what he said in November, when the administration announced its plans.
"Unless the administration comes to its senses and abandons this absurd idea," Pence said Friday, "the Republicans, and I suspect some Democrats, will abandon funding."
In addition, six senators on Tuesday wrote to Holder and urged him to abandon the idea.
The letter read, in part, "You will be providing them one of the most visible platforms in the world to exalt their past acts and to rally others in support of further terrorism."
It was signed by Senators Joseph I. Lieberman, independent of Connecticut; John McCain, Republican of Arizona; Blanche L. Lincoln, Democrat of Arkansas; Susan M. Collins, Republican of Maine; Jim Webb, Democrat of Virginia; and Lindsey Graham, Republican of South Carolina.