Senator Elizabeth Warren on Wednesday questioned Apple Inc. Chief Executive Officer Tim Cook on his discussions with the Trump administration ahead of the president’s retreat on tariffs covering crucial Apple products built in China.

It discusses The Washington Post’s recent report about Cook’s discussions with White House officials, including a reported conversation with Commerce Secretary Howard Lutnick about how tariffs could impact the price of iPhones.

It's no secret that Apple and other big tech companies have been making moves to earn President Trump's favor, but Senator Warren wants details on these interactions to determine if lines were crossed.