This thing could be over very soon

Three things just happened in the last few hours:

• Pennsylvania Senator Bob Casey endorsed Barack Obama.  Bad news for Hillary in a state where she leads and must win.
• DNC Chairman Howard Dean stepped in and said for the first time that this race must be resolved by July 1st.  It will not go to the convention still deadlocked.  Again, bad news for Hillary.
• Senator Pat Leahy (D-VT), a very powerful elder in the Democratic Party that chairs the Senate Judiciary Committee, is calling on Hillary to drop out.  This comes one day after Chris Dodd, another Senator, called on the former First Lady to get out because she has no chance of winning.  Once again, bad bad news for Hillary.

This has all happened in such a short time frame.  Obama previewed to us a few weeks ago that his campaign would roll out a series of high-profile endorsements before the Pennsylvania primary, giving him added momentum to possibly win there.  So is this it for the endorsements, or will there be more?  Gore?  Edwards?  Carter?

Both time and momentum are not in Hillary's favor.  If Obama wins Pennsylvania, this thing is over.  A few weeks ago, Hillary was so far ahead there.  But with all this added momentum, plus the start of Obama's six-day campaign bus swing there, he may actually have a chance.