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[en] We provide a brief status report on measurements and simulations of the electron cloud in the Fermilab Main Injector (MI). Areas of agreement and disagreement are spelled out, along with their possible significance. An upgrade to the MI is being considered that would increase the bunch intensity Nb, from the present ∼ 1 x 1011 to 3 x 1011, corresponding to a total pulse intensity Ntot = 16.4 x 1013, in order to generate intense beams for the neutrino program. Such an increase in beam intensity would place the MI in a parameter regime where other storage rings have seen a significant EC effect. Motivated by this concern, efforts have been undertaken over the recent past to measure and simulate the magnitude of the effect and to assess its operational implications on the proposed upgrade. We report here a summary of simulation results obtained with the code POSINST, and certain benchmarks against measurements. Unless stated otherwise, the simulation parameters used are shown in Tab. 1. Some of these represent a slightly simplified version of the MI operation.