NBC News:

It’s now official: The day after former President Donald Trump’s federal election-interference trial begins in DC on March 4 — so after Super Tuesday — Republicans will have allocated nearly half of their delegates (47%) from the contests in the 2024 GOP presidential race. 

A week later, by March 12, that percentage will grow to 54%. After the primaries on March 19, it will be 69%. And after Louisiana’s primary on March 23, 71% of all delegates in the Republican race will have been allocated.