My point is that because they polled only in July and then last week, the difference between the two polls doesn't tell you anything about the trend now. Yes, he is up 3 points over where he was in July, but there is no way to tell what has happened in between. Maybe he was up 10 points in August, then lost 7 points of that gain. Maybe he was flat until last week, then spiked up 3 points last week. The point is, with no comparable polls between July and last week, it's hard to tell what the current trend is.
That is one of the reasons that early polling--especially early state-by-state polling--does not tell you all that much. Much of the value of polling comes in the aggregation of polls, to tell trends, etc., and early polling (and, again, especially early state polling) is relatively sparse.
And when it gets closer to early state primaries the state polls have much more meaning than the manipulated national polls that the silly talking heads go gaga over. Trump leads in all early state caucuses and primaries; FL, SC, IA, and NH. I don't see that changing much.
I saw this tweet report for you edification. Chucky T. may have swallowed his tongue.
"Chuck Todd looked like you ran over his dog when they showed the poll of 71% of the MSNBC viewers approving of Trump's tax plan. @NolteNC"
Even Liberals love getting more money in there pockets.