Both sides were fixated on the case study of Representative Elise Stefanik, a Republican from New York who vaulted to fame among conservatives and infamy among liberals for her fierce defense of Mr. Trump. After her Democratic opponent in next year’s election reported raising $1 million from Trump critics outraged by Ms. Stefanik’s performance, conservatives who once were suspicious of her moderate credentials rallied to her side and she was given prized slots on Fox News.

“We just raised 250k in 15 MINUTES,” Ms. Stefanik wrote on Twitter just hours after impeachment hearings concluded on Thursday. “THANK YOU! help us get to 500k TONIGHT.”

In five days of public hearings over two weeks, the committee heard from 12 witnesses, all of them current or former administration officials and most with years if not decades of public service under presidents of both parties. With an average of 12 million Americans watching each day, the testimony laid out in meticulous detail an effort by Mr. Trump and his lieutenants to pressure Ukraine into helping him tear down his domestic political rivals.

Lawmakers were told that Mr. Trump wanted Ukraine to announce that it would investigate former Vice President Joseph R. Biden Jr. as well as a debunked conspiracy theory about Ukraine helping Democrats in the 2016 presidential election, the latter a figment of disinformation propagated by Russia, according to American intelligence agencies. Mr. Trump clearly conditioned a coveted White House invitation for Ukraine’s president on his demand for the investigations and several witnesses said it was obvious he held back $391 million in American aid as leverage as well.

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Republicans poked holes in the testimony, making clear that none of the witnesses had actually heard Mr. Trump explicitly tie the security aid to the investigations, and they complained vociferously about the process, assailing it as tilted against the president. Some Republicans conceded that Mr. Trump did in fact do what he was accused of doing but maintained that it was not impeachable.

Whatever the hearings revealed about Mr. Trump’s conduct in office, they seemed to only reinforce just how polarized the country has become. No lawmakers declared that the evidence had changed their minds in either direction and judging by polls most Americans seemed to find only validation for the viewpoint they had when the hearings began.

Indeed, listening to Republicans and Democrats, or their friendlier media, would give the impression of two radically different sets of hearings, one that presented damning, incontrovertible evidence that the president abused his power or one that revealed that the whole proceeding was a partisan sham.