News that Sen. Edward Kennedy (D-Mass.) has a malignant brain tumor prompted posts of encouragement and expressions of sadness from all over the blogosphere. Meanwhile, a battle between the Barack Obama and Hillary Clinton campaigns over sexism and last minute looks at Kentucky and Oregon also have bloggers talking.

More information, including a prognosis, will soon be coming out, but the initial news that Kennedy has a brain tumor is awful, writes Daily Kos

Hillary Clinton is showing no signs of dropping out, instead defying pressure and running an ad in a June 3 primary state, liberal bloggers find. And the Iraqi government has claimed sovereignty over its country as a new offensive succeeds in Sadr City, conservatives declare.

Clinton is not listening to anyone telling her to drop out of the Democratic primary, including former Deputy Treasury Secretary Roger Altman, Andrew Sullivan says. A new television ad in South Dakota, one of the last states to vote, means she is pressing on to the end of the trail, TPM Election Central

With Barack Obama about to clinch a majority of pledged delegates after Tuesday's primaries in Kentucky and Oregon, pro-Obama bloggers are becoming more magnanimous toward Hillary Clinton. Obama, meanwhile, continues to take hits from the right over his position on Iran. But all bloggers are down on Republicans running for Congress this year.

Obama should win Oregon by double digits -- 13.8 percent, to be exact -- writes Poblano, whose analysis of the Indiana and North Carolina primaries was dead on. Though Obama is nearing the nomination, no one should forget Clinton's "dedication, perseverance and indefatigable drive," qualities that should make her a role model for both women and men, writes Obama supporter Arianna Huffington. They should also know that Clinton has some juice left, as she does better against John McCain than Obama does in 13 rural battleground states, according to a new poll highlighted by TalkLeft's Jeralyn.

Online supporters of McCain, however, are completely focused on weakening Obama. Though the Democrat said over the weekend that Iran "didn't pose a serious threat to us," he contradicted himself Monday by saying that he's "made it clear that the threat from Iran is grave," according to Power Line's John Hinderaker. Obama should fire his foreign policy adviser Greg Craig, since he once represented a Panamanian lawmaker whose indictment on murder charges Obama cited as a reason to vote against a free trade deal, writes RedState's Soren Dayton. And Obama's wife, Michelle, shouldn't be exempt from scrutiny, either, since she has campaigned vigorously for her husband, writes Power Line's Paul Mirengoff.

There

Sen. Robert Byrd

Barack Obama has miscalculated the changing world saying Iran

Barack Obama

The resignation of another lobbyist from John McCain

Bloggers wish Sen. Ted Kennedy (D-Mass.) well and hope for a speedy recovery after he was hospitalized today for what appears to have been a seizure. They are less sympathetic towards Sen. Tom Harkin (D-Iowa) for saying John McCain

Mike Huckabee joking about Barack Obama getting shot at outrages bloggers. Speculation that John Edwards will be Obama