Fox News’ Chris Wallace grilled Vice President Mike Pence on Sunday over whether Republicans are using the government shutdown as leverage for President Trump’s southern border wall.

Pence’s appearance on “Fox News Sunday” comes after House Speaker Nancy Pelosi, D-Calif., rejected Trump’s offer to congressional Democrats to exchange $5.7 billion in wall funding for a three-year extension of the Obama-era program providing legal status for “Dreamers,” who came to the U.S. illegally as children, as well as a short-term reprieve for immigrants who arrived under the Temporary Protected Status framework.