I watched some of the hearing last night and found it quite annoying as members from each side just kept regurgitating what everyone else on the committee from their side of the aisle was saying. I went to bed before it concluded for the night. It does seem to appear these hearings have benefited Trump in gaining more support against impeachment from voters in swing states for several reasons. First of all, the Dems were trying to make the impeachment with charges of bribery and obstruction of justice. They came to the realization they couldn't make a case out of those and went with abuse of power and obstruction of Congress. Those are very weak charges as well.
I do have to say the Republicans did a good job pointing out how Obama invoked executive privilege in denying documents and testimony during hearings on Fast and Furious and the Benghazi attack. The Republicans also pointed out how many of the Democrats now sitting on the Judiciary Committee are hypocrites when they supported Obama when he used executive privilege refusing to honor Congressional subpoenas for testimony and documents.
This will blow up in the Democrats faces when this goes to trial in the Senate as subpoenas will be issued for Schiff and members of his staff to testify about their contacts with the whistleblower. The whistleblower will also be subpoenaed and will have to testify under penalty of the law. LTC Vindman will also be forced to testify and reveal who it was outside the WH he talked to about the phone call. He can claim the 5th, but that will only further damage his credibility.
The Senate trial will further serve to prove the Democrats attempt to impeach Trump and oust him from office was established from the day he was elected and purely a plot to further the advances of the Democratic Party in hopes of getting the WH, gain the majority of the Senate, and maintain majority of the House. In other words, this movement was purely established for their members and party's political benefit. They know the current crop of liberal presidential hopefuls do not stand a snowball's chance in hell of beating Trump. It's the economy Democrats that is really benefiting you and that's why you don't want Trump and have been dreaming for a recession.
The Democrats will fail big time in a Senate trial and they will lose seats in Congress. Notice how these hearings have not hurt the stock market? Investors are smart. They too see the Democrats losing their asses over this. It's apparent to them Trump will be re-elected and the Republican Party will make gains in the House standing a good chance to get back the majority. They see this will result in the removal of more regulations, lower taxes, and better trade deals with other countries. This is also why donations to the GOP and the Trump campaign have been outpacing donations to the Democrats.
Most importantly, those 63 million "deplorable" voters who supported Trump in 2016 will support him in 2020, as well as others because they see this impeachment as a political stunt by the Democrats, but most importantly they are doing much better today than they were when Obama was president.