NBC/Marist NC: Biden +6

[Pollster]

Marist is usually a good pollster, no?

Ask Sen. Donnelly and Sen. McCaskill.

Marist's final polls had McCaskill at 47% (she got 46%) and Donnelly at 45% (he got 45%).

[Pollster]

Marist is usually a good pollster, no?

Ask Sen. Donnelly and Sen. McCaskill.

Marist's final polls had McCaskill at 47% (she got 46%) and Donnelly at 45% (he got 45%).

No.  they had Mccaskill at 50 and Donnelly at 48.

They most certainly did not:

Indiana they had Donnelly 45, Braun 42, Brenton 7, Other 1, Undecided 5
Missouri they had McCaskill 47, Hawley 44, Campbell 3, Crain 2, Other 1, Undecided 3

Republicans in both appeared to benefit from third parties underperforming their polling (as they almost always do) and winning over most undecideds (common in safe states for the dominant party).

[Pollster]

Marist is usually a good pollster, no?

Ask Sen. Donnelly and Sen. McCaskill.

Marist's final polls had McCaskill at 47% (she got 46%) and Donnelly at 45% (he got 45%).

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They were still wildly off margin wise. Also, if a Candidate gets a lower share of the vote than your polls show (like with McCaskill) then theirs something wrong with your polls.

Margins are close to meaningless in polling, and a 1% over/underperformance is statistically insignificant unless you have a margin of error of less than 0.5% thanks to rounding, which you don't achieve until you have a sample size of ~13,000.