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'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.

Apple’s CEO Tim Cook spoke to Commerce Secretary Howard Lutnick last week about the potential impact of the tariffs on iPhone prices.