Washington (CNN) Senate rules limit what images can be broadcast on TV during the impeachment trial of President Donald Trump.

Notably, that restricts viewers from seeing how senators are responding to arguments of each side , or if they're even in the chamber as the proceedings continue. Trump's legal team on Tuesday wrapped up its opening arguments.

Here's what sketch artist Bill Hennessy saw from his perch in the press gallery, including views of Democratic presidential contenders Bernie Sanders and Elizabeth Warren, and former Republican presidential nominee Mitt Romney.

Sen. Bernie Sanders, I-Vermont, and Democrats watch the Senate impeachment trial, January 28, 2020

Trump attorney Patrick Philbin speaks at the Senate impeachment trial; January 28, 2020

Trump attorney Patrick Philbin speaks at the Senate impeachment trial as Democratic lawmakers watch; January 28, 2020

Utah Republicans Sens. Mitt Romney and Mike Lee speak during the Senate impeachment trial; January 28, 2020

Utah Republicans Sens. Mitt Romney and Mike Lee speak during the Senate impeachment trial; January 28, 2020

Utah Republicans Sens. Mitt Romney and Mike Lee speak during the Senate impeachment trial; January 28, 2020

Glass of chocolate milk on the desk of Sen. Mitt Romney (R-Utah) during the Senate impeachment trial; January 28, 2020

See more scenes from the trial: