Because he is now leaning on Pelosi to take a tough stand with Harry Reid:

House Majority Leader Steny H. Hoyer (D-Md.) is pushing Speaker Nancy Pelosi (D-Calif.) to take a harder line with the Senate after a trio of Republican senators forced Congress to trim billions from the $787 billion economic stimulus package.

It’s not clear how far Pelosi is willing to go in standing up to the Senate — or, realistically, what effect Hoyer and Pelosi combined could have in the face of the 60-vote hurdle Senate Democrats face.

But after last week’s stimulus votes, Hoyer called on Senate Majority Leader Harry Reid (D-Nev.) to force Senate Republicans to mount actual filibusters if they want to stand in the way of bills “so that the American people can see who’s undermining action.”

….

(emphasis mine)

I’m not sure what is going on, but I’m not complaining.