The White House on Friday blamed Sen. Elizabeth Warren, D-Mass., for blocking the Senate's effort to confirm a top economic official to the Trump administration this week.

The Senate approved 65 Trump nominees on Thursday but left out Kevin Hassett, Trump's pick to chair the Council of Economic Advisers.

"You should ask Elizabeth Warren why he wasn't part of the deal," a White House official said when asked why Hassett didn't make it. The official added it's the White House's understanding that Warren rejected the idea of granting unanimous consent to quickly approve Hassett on Thursday.

A spokesperson for Warren declined to comment on the matter, but said that the senator believes that Hassett's views on finance, taxes, and trade agreements would damage the economy.

In June, Warren asked to be marked down as the lone "no" vote when Hassett's nomination to chair the Council of Economic Advisers cleared the Banking Committee on voice vote.

A spokesman for Majority Leader Mitch McConnell said that in Thursday's action, the Senate was only able to approve those nominees who had unanimous consent from every senator.

Hassett, a free-market economist who previously was a scholar at the American Enterprise Institute and has advised GOP candidates, has received support for his nomination from both sides of the aisle, including from economists who served in former President Barack Obama's administration.

Jason Furman, the last chairman of the council under Obama and one of the Democratic economists to endorse Hassett, drew attention Friday on Twitter to the fact that Hassett's confirmation has taken longer than past candidates' for the same position. Now, the earliest Hassett could be installed is when the Senate returns in September.

The Council of Economic Advisers is supposed to provide economic forecasts and evaluate the economic impact of different options for the president. Unlike National Economic Council Director Gary Cohn, Hassett would not be expected to play a major role in negotiating policies with Congress and weighing political tradeoffs. In the past, though, council chairs have represented the administration to the public in different circumstances and helped shape some initiatives.