In a televised address at 8 p.m., Tusk accused the opposition Law and Justice (PiS) party, President Karol Nawrocki and former President Andrzej Duda of undermining the rule of law.
"Nobody had any doubts that the Tribunal, in the form imposed on it by PiS, was not a genuine court," Tusk said.
He said the government and parliamentary majority had proposed legislation and resolutions to restore the rule of law, but these had been blocked by the president and PiS.
'On certain issues, there can be no compromise': PM
He argued that lawfully elected judges, who had previously been prevented from taking up their duties, were attacked when they tried to do so.
"On certain issues, there can be no compromise. Shouting, lies and brawling cannot be the source of law in Poland," he said.
The meetings at the presidential palace began at 1 p.m. on Saturday.
Polish People's Party (PSL) leader Władysław Kosiniak-Kamysz reiterated his proposal for a constitutional reset intended to restore trust in the Tribunal, guarantee judicial independence and end the dispute.
Left-wing politician Adrian Zandberg of Razem (Together) proposed ending the terms of all current Tribunal judges and electing a new bench by a constitutional majority.
Far-right Confederation leaders Krzysztof Bosak and Sławomir Mentzen also presented what they called a concrete proposal for a reset, which they said Nawrocki viewed favourably.
Former prime minister Mateusz Morawiecki and Marcin Horała presented Nawrocki with the idea of a constructive vote of no confidence.
Under their proposal, former Sejm speaker Marek Jurek would become prime minister and lead a technical government tasked with organising elections in 2027. Morawiecki said the choice of candidate remained open to discussion.
Representatives of the governing Civic Coalition (KO), the Left and the Centre parliamentary group did not hold talks with the president.
Supreme Court chief Zbigniew Kapiński convened an extraordinary general assembly of Supreme Court judges for Tuesday.
The judges are expected to discuss what the order describes as threats to Poland's constitutional order, judicial independence and the functioning of constitutional state institutions, and adopt a resolution.
(sp/gs)
Source: PAP