One aspect of congressional capacity i the calendar: how long the House and Senate are in town doing legislative business affects how much they can get done. Rachel Bade of Politico reports:
The House will be in session for 145 days next year, an increase over the 132-day average during nonelection years for the past three GOP-led Congresses. It adds up to 13 more days of work in 2017, spread over several additional weeks.
By the way, the Senate and House 2017 calendars are avaiilable: