Robby Mook knows. Oh yes. Robby Mook knows.

From Politico: http://www.politico.com/story/2016/03/clinton-memo-bernie-sanders-no-hope-220124

“We have no doubt that as long as Sen. Sanders remains in the primary, he will continue to win elections along the way, but it will make little difference to Hillary’s pledged delegate lead,” Mook wrote. "This upcoming Saturday will reinforce the point: although we continue to fight for every vote, Sen. Sanders has clear advantages and is investing heavily in two upcoming caucuses (Nebraska and Kansas). But even if Sen. Sanders does win in these states, we anticipate being able to win Louisiana by a larger margin and emerge from the day with more delegates."

“In other words, over the upcoming weeks, we intend to steadily add to Hillary Clinton’s already sizable lead in delegates, and as we do, it will become harder and harder mathematically for Sen. Sanders to ever catch up,” Mook added in the memo, which echoed his post-Iowa missive to top donors, when he told them Sanders was no longer a viable candidate.

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In the four-page note, which was distributed to reporters on Wednesday morning, the operative also took aim at the Sanders’ camp’s focus on Michigan’s March 8 primary as a major point of opportunity for the underdog.

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“Sen. Sanders is competing very aggressively in Michigan, where he has already spent $3 million on TV. We are also competing to win in Michigan and feel good about where that race stands, but even if Sen. Sanders were able to eke out a victory there, we would still net more delegates in Mississippi, which holds its election on the same night,” Mook said of the state where Clinton hold a wide lead in the polls. “The end result is that Sen. Sanders will spend millions of dollars in Michigan but not make any net gain in pledged delegates because he isn’t competing in states like Mississippi."