Now, this is not to say that Republicans intrinsically like deficit spending more than Democrats. There may be a "Nixon goes to China" effect here - Democrats, long stereotyped as the party of deficit spending, may simply be anxious to seem fiscally responsible, while Republicans, secure in their undeserved "fiscal conservative" reputation, feel free to bust the budget. But this doesn't change the basic dynamic: Republican presidents seem much more likely than Democratic presidents to borrow and spend when the economy is growing.
This suggests that if we care about reversing the deficit once the economy recovers (as it now seems to be doing), we should go with Obama over Romney, despite Obama's large deficits.
2) THE FULL FAITH AND CREDIT OF THE U.S.
It's tempting to think that both parties are equally prone to cynical obstructionism. Tempting, but wrong. In 2011, Congress' near-failure to raise the debt ceiling nearly precipitated a default on a portion of America's national debt. This disaster was averted by a last-minute deal, which postponed the difficult budgetary issues and created the "fiscal cliff." But the near-brush with disaster was enough to shake the world's previously unshakable confidence in the solvency of the United States government. Four days after the debt ceiling deal, Standard & Poor's downgraded their rating of U.S. government debt.
How much can a country safely borrow? There is no theoretical upper limit on national debt. The limit comes only from the willingness of people to keep lending the government money; if people believe that a nation's government functions well and will not ever default, then debt can go to 250% of GDP, as it did in Britain after World War II, or even higher. But if people believe that a government will succumb to the temptation to default, then they will stop lending it money at low interest rates (ironically making a default more likely). Before 2011, U.S. government debt was considered the safest financial asset in the world, so much so that financial models all around the world considered T-bills to be "riskless." But Republican brinksmanship put the world's unalloyed faith in U.S. debt at risk.
Why should we blame Republicans for the debt ceiling debacle, rather than President Obama? Two reasons. First, congressional Republicans repeatedly rejected Obama's attempts at compromise (in which he offered Republicans essentially everything they wanted). This is a strong indicator that Republicans' motive for the brinksmanship was to cause political trouble for the president, not to attain any policy goals. That kind of political grandstanding deserves to be punished by the electorate. Second, Republicans themselves expressed a blasé lack of concern about the prospect of default. Paul Ryan, Romney's running mate, claimed that a temporary default would not trouble financial markets. And a Reuters poll during the debt-ceiling crisis found that 53% of self-identified Republicans were not concerned about the economic consequences of a temporary default. Finally, a number of members of the Republican "Tea Party" movement, including Mark Meckler and Jim Babka, explicitly suggested that a U.S. default would be preferable to a debt ceiling deal. This shows that Republicans tend to be less worried than Democrats about the prospect of a loss of confidence in the United States' fiscal responsibility.