Refinery workers listen as Senator Ted Cruz (R-TX) gives a speech during a rally at the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) talks to gathered media at a visit of the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) talks to gathered media at a visit of the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) rallies for a change in the renewable fuel standard during a visit of the bankrupt refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) visits the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) visits the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) rallies for a change in the renewable fuel standard during a visit of the bankrupt refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) visits the refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.

Senator Ted Cruz (R-TX) rallies for a change in the renewable fuel standard during a visit of the bankrupt refinery of Philadelphia Energy Solutions, in South Philadelphia, PA, on February 21, 2018.