Were are you getting your poll numbers from?
From what I have read over the past 2 months the numbers haven't changed.
Half of people say they approve of the impeachment inquiry — 50% — compared to 43% who don't. That's about the same as in the poll a month ago (52% to 43%). But Americans are pretty much split down the middle — 45% to 44% — on whether they think Trump should be impeached and removed from office.
There is little question, however, what Americans think of Trump's conduct on that now-infamous July 25 call, in which Trump asked the president of Ukraine for a "favor" to conduct the investigations.
Seventy percent say it is not acceptable for a president to ask a foreign leader to investigate a political opponent. That includes 53% of Republicans who say it's either unacceptable (37%) or they're unsure (16%).
Opposition by independents to the House’s ongoing impeachment inquiry jumped 10 percentage points in the last week, according to a P
The longer this drags on the more unpopular it will become.