It has been miserable. I need to compare Trump to Romney & MCain at the same point in time. Last time someone checked, Trump was on track to acquire more votes than both of them combined.
Cruz has lost all the regional areas and battleground states that are essential for a general election win.
McCain had the nomination wrapped up at this point in the 2008 campaign. More raw votes don’t matter if the percentages stay the same.
At this point in the race his delegate count is far above Mitt’s.