Trump has eaten away at the Republican's (entirely unearned and undeserved) historical advantage on the economy, to the point that Harris has drawn equal to him

Trump has eaten away at the Republican's (entirely unearned and undeserved) historical advantage on the economy, to the point that Harris has drawn equal to him on voter confidence on that topic, so without diving deeper, it's not clear that worries about "the economy" is a Republican advantage today.