Here is an academic source on Bush v Gore. Bush lost in the state courts.
https://www.annenbergclassroom.org/resource/the-pursuit-of-justice/pursuit-justice-chapter-23-judicial-path-white-house/"
Florida law seemed to favor Gore. It provided that a candidate could request a hand recount in any county and that, if the election were close enough, as this one was, an automatic recount would be triggered statewide. But the Republicans, led by James Baker, the former secretary of state for President George H. W. Bush, decided to contest these recount efforts. They filed suit in federal court asking for an injunction to block them. The judge refused to grant the injunction and instead
directed the Republicans to plead their case before the Florida courts. They found an unreceptive audience. The Florida Supreme Court rebuffed attempts by Florida secretary of state Katherine Harris to order an end to the recounts. Nevertheless, Harris proceeded on her own authority to declare that any recounted ballot would not be accepted after a specified time. Gore’s lawyers challenged her order in the state courts, and on November 21, 2000, the Florida Supreme Court again rejected Harris’s actions and ordered that the recounts continue through the Thanksgiving weekend. Harris also ignored these findings and declared Bush the winner.
The Bush team again turned to the lower federal courts and ultimately the Supreme Court, which held an expedited review of the case. The Bush team argued that the Florida court had erred in two ways. First, it had violated the equal protection clause of the Fourteenth Amendment by permitting the recounts. Bush claimed that because there was no standard that could be applied statewide to what constituted a legal ballot, some counties would have more liberal standards than others."
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So the state courts did not favor Bush, but the US Supreme Court did favor Bush. The Secretary of State also favored Bush in the above passage on her own authority, but we are only talking about courts here.
This state court bias towards state laws and processes shows that an argument based solely on state rulings is fallacious.