Many Democratic lawmakers are interpreting Sen. John Kerry’s active participation in selecting the next chairman of the Democratic National Committee (DNC) as the strongest signal yet that the defeated presidential candidate is keeping his options open for a bid in 2008. Last week, Kerry contacted nearly every elected member of the House Democratic leadership, and other powerful lawmakers, on behalf of Gov. Tom Vilsack of Iowa. On Monday, Vilsack issued a statement that he was no longer pursuing the chairmanship. But Kerry’s aggressive support of Vilsack has convinced many key House Democrats that Kerry wants to install a chairman who...