The Senate will not allow President Trump to make recess appointments during Congress' summer break.

Sen. Lisa Murkowski, R-Alaska, set up pro-forma sessions on Thursday, just before Congress' August recess is set to begin.

In a pro-forma session, a senator quickly gavels the chamber in and out of session. It requires a senator to be present in Washington during the recess period. The meetings typically last about one minute.

The Constitution states neither the Senate nor the House "can adjourn for more than three days without the consent of the other." In the last few years, the sessions have been used to block potential recess appointments by the executive branch.

Both Republicans and Democrats expressed their opposition to Trump's making recess appointments after his statements criticizing Attorney General Jeff Sessions. Trump said he wouldn't have appointed Sessions if he had known he would recuse himself from the Russia investigation.

Senators are not expected to return until after Labor Day.