The Republican Polls are internal & not privy to the general public.
They reflect more of what poll experts confirm:
In reporting about the 2020 presidential contest, it’s likely that many of those stories quote nationwide polls.
Hopefully most Americans have figured out that both the primary elections to choose a presidential nominee and the
general election to choose the president are state-by-state contests.
But statewide polls are much less reliable than nationwide surveys.
President Trump remains highly competitive in the battleground states likeliest to decide his re-election.
In 2016, Clinton was ahead in the national poll but not in the key states & the Media is making the same error again. Many Democrats have left the party but they are still being counted as Biden votes.
Not only is Biden losing votes, the Independents are going to Trump again.
Independents are divided 47% for Trump and 41% for Biden.
Among all registered voters in Iowa, Donald Trump is supported by 48% and Joe Biden is supported by 45%.
The race remains tight when different likely voter models are applied. A model based on a higher level of turnout than 2016 puts the race at 48% Trump and 46% Biden while one reflecting lower turnout produces a similar 47% Trump and 47% Biden result
The Monmouth University Poll - from July 30 to August 3, 2020 have a margin of error of +/- 4.9 percentage points. The poll was conducted by the Monmouth University Polling Institute in West Long Branch, NJ.
Betting markets, however, are certainly not writing Mr Trump off. The latest odds still give him about a one in three chance of winning on 3 November.
Which Republican polls are you referring to? I can't find one that confirms your report.