Okay, I'll be polite and take your word that the statements and quotes are from those sources (even without links or attributions). We can have friendly debates here at DU.
Regarding these negative attacks...
1. Joe Sestak registered to vote as an Independent in August 1971.
As explained above, it is customary for high ranking military officers to register as Independent to appear nonpartisan. The military depends on cohesion and unity, and the defense of this nation must never be political.
2. He did not vote in any primary elections from 1971-2005.
In PA, one must be registered as Democrat or Republican to vote in primary elections.
3. He did not vote in these 23 general elections during that same time: 1973,74,75,77,79,81,83,84,85,87, 1989-1999, 2001, 2002.
From a statement released by Rep. Sestak: "As for my voting record, Arlen Specter should get his facts straight. Obviously, I didn’t vote in any primary elections because Independents are prohibited from voting in party primaries in Pennsylvania. Arlen Specter claims I didn’t vote, for example, in the 1992 general election, even though voting records show that I did. In other years – for example, in 1994 -- the records show that I requested an absentee ballot because I was serving out of Pennsylvania. And I also clearly remember voting at other times by absentee ballot, such as in 2002, while I was leading an aircraft carrier battle group in the war in Afghanistan. Unfortunately – as multiple reports have documented – it is all too common for service members serving in our military to not have their ballots counted because they arrive too late."
It's also noteworthy that Arlen hit Joe for "not voting" -- when really his ballot was not counted due to the rampant problems with military absentee balloting -- problems so widespread legislation to fix it was co-sponsored last month by Arlen himself: S1026, The Military Voting Protection Act of 2009.
Here's an article about the problems with military absentee voting:
http://www.sftt.org/cgi-bin/csNews/csNews.cgi?command=viewone&id=165&database=DefenseWatch%202005.db4. He re-registered as a Democrat in February 2006, just weeks before he began his campaign for Congress in Pa-7.
Admiral Sestak retired from active duty in 2006 and immediately registered as a Democrat.
5. In last Sunday's Express-Times, Sestak said he was the only 'real Democrat' in the race.
Many here and elsewhere have made this same argument. Arlen Specter switched parties primarily because he had serious doubts about being able to win the Republican primary. (Reply # 1 & # 10).
We're not hearing any defense of Sen. Specter's anti-liberal, anti-environment voting record touched on in reply # 6, or his actively campaigning for Rick Santorum, George Bush, and John McCain.