After hours of mysterious closed-door meetings that went past midnight, the Wisconsin Senate convened at 4:30 on Wednesday morning and passed by one vote a package of bills devised to curb the powers of the incoming Democratic leaders. The State Assembly followed suit by a much larger margin later in the morning.

The legislation was aimed at undermining Democrats. There would be a new limit on early voting, which tends to benefit Democratic candidates, after an election that saw record-breaking turnout. Lawmakers, not the governor, would control the majority of appointments on an economic development board. The legislation would also prevent Mr. Evers from banning guns in the Wisconsin Capitol without permission from legislators.

The bills would also require Mr. Evers to get permission from lawmakers to seek adjustments on programs run jointly by federal and state governments, such as public benefit programs. The legislation would block Mr. Evers’s ability to withdraw the state from a lawsuit challenging the Affordable Care Act, a major campaign promise.

But the legislative package was so sprawling and rushed that many Democrats were still trying to assess the damage…

The package of bills passed Wednesday take aim at the powers of not just the governor, but those of the newly elected Democratic attorney general, Josh Kaul. Under the legislation, the attorney general would need lawmakers’ approval to settle certain suits, and legislative leaders would be permitted to intervene and hire their own lawyers — in addition to the attorney general — if the constitutionality of a law was being challenged. The attorney general could no longer appoint a solicitor general to represent the state in major lawsuits, and would be restricted in how he spent settlement money, which lawmakers would now oversee.

Senators also confirmed 82 last-minute appointees of Mr. Walker’s despite the protestations of legislative Democrats, who said the candidates had not been thoroughly vetted, and of Mr. Evers, who asked that the posts remain vacant until he takes office in January. The posts ranged from the obscure, like the pharmacy examining board, to the high-profile and vital, such as the university board of regents.