A lot of eyes are on the office of Rep. Mike Castle, a Republican member of the House from Delaware who’s been mulling a campaign for Senate next year. He’s expected to announce his decision at noon. If the longtime, widely respected lawmaker runs, he’s no worse than 50-50 against Beau Biden, son of Vice President Joe Biden.

If he doesn’t run, most political observers think Beau Biden will win the seat pretty easily.

Of course, if Castle gets in, then the race will be expensive and spread the Democrats’ resources over an even wider array of races next year . . .

UPDATE: Kevin Madden, a well-connected former Romney guy, says he hears Castle is in.

And a Delaware news site says they’re hearing he’s in, too . . .