When Parnell entered Parliament he took his cue from John O'Connor Power and Joseph Biggar and allied himself with those Irish members who would support him in his obstructionist campaign. MPs at that time could stand up and talk for as long as they wished on any subject. This caused havoc in Parliament. In one case they talked for 45 hours non-stop, stopping any important bills from being passed. Butt, ageing, and in failing health, could not keep up with this tactic and considered it counter-productive. In July 1877 Butt threatened to resign from the party if obstruction continued, and a gulf developed between himself and Parnell, who was growing steadily in the estimation of both the Fenians and the Home Rulers.