"Barack Obama seems to be making a very calculated attempt to win over 270 electoral votes," wrote liberal blogger Carol Foyler at LibDemWatch.com, a blog read by a half-dozen other liberal bloggers. "He must be stopped."
But those comments were not nearly as strident as those of Tracy Klugian, whose blog LoseOn.org has backed unsuccessful Democratic candidates since 2000.
"Increasingly, Barack Obama's message is becoming more accessible, appealing, and yes, potentially successful," he wrote. "Any Democrat who voted for Dukakis, Mondale or Kerry should regard this as a betrayal."
Democratic National Committee Chairman Howard Dean said that he was "sympathetic" to the concerns of bloggers who worry that their nominee seems stubbornly bent on winning the election, but he warned them that the DNC's "hands are tied."
Liberal bloggers said that they would be watching Sen. Obama's vice-presidential selection process "very closely" for signs that he is plotting to win the election.
"Barack Obama still has a chance to pick someone disastrous as a sign that he wants to lose this thing," Ms. Foyler wrote. "If not, he should brace himself for some really mean blog posts."
Elsewhere, Sen. John McCain released a new series of campaign ads, showing him answering a telegraph key at 3 am.