The strategy is likely to garner pushback from Democrats. An aide working on the trial said on Friday that they would be "keeping a sharp eye" if there are any differences on "the amount of time or the number of days" in the upcoming trial compared to Clinton. The strategy would set up four long days on Capitol Hill as soon as Wednesday unless either House managers or Trump's legal team agrees to yield back time. The impeachment trial isn't expected to start until 1 p.m. each day. Republicans have said they are using the 1999 Clinton trial as their model as they draft the rules for Trump's proceeding. But limiting the number of days each side has to present their arguments to two days would be a break with the previous trial, even if the total number of potential hours is still expected to be the same. "the House of Representatives shall make [its] presentation in support of the articles of impeachment for a period of time not to exceed 24 hours. Each side may determine the number of persons to make [its] presentation. The presentation shall be limited to argument from the record. Following the House of Representatives presentation, the President shall make his presentation for a period not to exceed 24 hours." A Republican leadership aide, asked about the time requirements, noted that the resolution isn't final until it's released. According to the 1999 resolution "the House of Representatives shall make [its] presentation in support of the articles of impeachment for a period of time not to exceed 24 hours. Each side may determine the number of persons to make [its] presentation. The presentation shall be limited to argument from the record. Following the House of Representatives presentation, the President shall make his presentation for a period not to exceed 24 hours."

In 1999, the House managers used three days to make their case, as did Clinton's team. Neither side used the full 24 hours.

Once the Senate hears opening arguments and senators get to ask questions, they will then need to vote on whether or not to call witnesses — an issue that has emerged as an early flashpoint within the Senate Republican caucus.