Why is Joe Biden always putting a "lid" on his campaign? If you're not familiar with the press lingo, a "lid" is a note to your press pool that you plan no further public events on your schedule. Biden tends to put a "lid" on it at 9 or 10 in the morning, saying his press corps has nothing to cover. On Sept. 23, they called a "lid" at 9:30 a.m. -- the ninth time they've done it this month. Is it due to never-ending debate prep? Biden denied that, saying he's just getting ready to prepare. Since March, Biden...