WASHINGTON -- After initially placing a hold on bipartisan legislation to help cities like Flint, Michigan, upgrade their water infrastructure, Sen. Ted Cruz (R-Texas) said he would not stop the measure from moving forward.

"He has reviewed the bill now and will not prevent it from moving forward," Cruz spokesman Phil Novack said in an email Thursday evening.

But it remains to be seen if the other senators potentially holding up the Flint legislation -- and an energy bill its fate is linked to -- will stop blocking the package.

Sen. Chuck Schumer (D-N.Y.) told reporters through a grin earlier Thursday that “a presidential candidate, not to name names,” was holding up the legislation, which was fast-tracked Wednesday using a procedural tool in the Senate. A single senator has the ability to stop that process. 

A Democratic aide said at the time that Cruz was one of the senators holding up the legislation, and a Cruz spokesman said his office was reviewing the legislation, which is part of a larger deal that includes an unrelated energy bill.

A few hours after news of the hold, Sen. Debbie Stabenow (D-Mich.), one of the chief Democratic architects of the measure, said on Twitter that she's "hearing good things, adding Republican support." She also tweeted that she's working with Republicans to clear up any issues.