Brown win could spark Obama war on Wall Street

Scott Brown’s stunning capture of the Massachusetts Senate seat held for decades by Ted Kennedy was a political black swan, a near-unpredictable event.

The result ends the Democratic supermajority in the Senate and leaves key parts of the Obama agenda in deep trouble. But the biggest loser just might be Wall Street. Desperate Democrats may see anti-bank populism as a way of holding power as the November midterm elections approach.

The last days of the heated Senate race saw the first attempts at that political gambit. Democratic candidate Martha Coakley’s allies in Washington, both the White House and national Democratic officials, used President Barack Obama’s proposed bank tax as a cudgel to bash Brown via emailings and telephone calls.

But the game was probably over by then for Coakley. A combination of high unemployment, an unpopular healthcare reform bill and the candidate’s own lack of charisma and effective experience were more than enough to clinch an easy Brown victory.

A historic victory, really. It is hard to overstate just how “blue” a state Massachusetts is. Obama won it by 26 percentage points in 2008. Until now the state’s 10 U.S House members, two U.S. senators and all statewide officers were Democrats. The state hasn’t had a Republican U.S. senator since 1979. And, of course, the seat Brown captured had been held by the late Edward Kennedy since 1962.

Now Brown’s victory threatens the healthcare reform bill that Kennedy championed on his deathbed. Democrats could still ram it through before Brown makes it to Washington. But potential legal challenges make that unlikely.

As it is, Brown’s election is enough of a systemic shock to freeze the political process on Capitol Hill. Moderate Democrats in both chambers are nervous about their previous “yes” votes for healthcare. They may be unwilling to make any more. The prospects look even bleaker for cap-and-trade energy legislation, a bill with even less support than healthcare.

Financial reform legislation was already likely to get milder rather than stronger. But not so the rhetoric. Unable to trumpet the economy, hitting Wall Street is one of the few political bullets Democrats have left.

So expect the Obama administration to go all out for the bank tax with increasingly harsh words for big financial institutions. Democrats may also be more willing to consider controversial proposals banks hate, like letting judges rework mortgages. But given the Massachusetts precedent, it may not be enough to save the party from a wipeout in the fall.