The Democratic senator said his Republican colleague was putting the health of staff at risk.
Two of Waters' Democratic colleagues have said that the stock market rules only seem to be a concern when smaller investors harm larger investment firms.
Cruz could also be expelled or stripped of their Senate committee assignments if enough senators agree.
"Both Senator Josh Hawley and Senator Ted Cruz have betrayed their oaths of office and abetted a violent insurrection on our democracy," said Senator Sherrod Brown.
"I will be on the floor," Ohio Democratic Senator Sherrod Brown said Tuesday, "make sure this comes to a vote."
The Republican senator said his Democratic colleague wore a mask as he spoke to signal "fake virtue."
"There clearly isn't much interest in this body in public health," Sen. Sherrod Brown (D-Ohio) said after admonishing Sen. Dan Sullivan (R-Alaska) for not wearing a face mask during a Senate hearing on Monday.
Sherrod Brown questioned why the Senate majority leader returned to Kentucky given the urgency of passing the bill.
Former Pennsylvania Senator Rick Santorum said "Republicans don't care" if Trump is guilty of the charges leveled in the articles of impeachment. Meanwhile, Ohio Democratic Senator Sherrod Brown said the GOP was "afraid" of the president. "Fear does the business," Brown said.
"I think they [the Senate] should hear the testimony that they can get," Congressman Francis Rooney said.
Sen. Sherrod Brown said his own biases against President Trump would be "immaterial" in the widely expected Senate trial.
The Senate Majority Leader scheduled a banking reform bill for consideration this week, effectively delaying a debate on gun control in Congress's upper chamber as much of the country turns to Capitol Hill for stricter firearms regulations.
The bill rolls back some regulations from the 2010 Dodd-Frank Act, which placed restrictions on banks in the wake of the financial crisis.