Joe Biden's election prospects appeared to take a hit from allegations hurled by Trump that are at the center of the House Democrats' impeachment probe. A loose transcript of a July 25 call with Ukrainian President Volodymyr Zelensky confirmed a whistleblower's claim that Trump asked him to investigate Biden and son Hunter's dealings in the country in 2016.

The October IBD/TIPP Poll found 57%-37% support for a Justice Department investigation of Biden and his son regarding their actions in Ukraine and China.

By comparison, Americans supported the House impeachment inquiry, 55%-44%. Half of Americans said the Trump's Ukraine actions are an impeachable offense, vs. 47% who say it's not. Still, Trump's job approval rating rose to 4 points to 43%, even as his biggest political scandal erupted.

So far there is minimal evidence of wrongdoing on Biden's part for helping to push out a Ukrainian prosecutor with a weak record in taking on corruption. But Republicans are pointing the finger at the former vice president, whose son Hunter was being paid $50,000 per month at the time for serving on the board of Burisma, a Ukrainian gas company. The owner of the company had previously been under investigation. Hunter Biden also had ties with an investment firm that raised funds in China.