This is the most important week of President Obamas bid for a second term in November.

Consider:

The Supreme Court will rule not only on the constitutionality of Obamas landmark health-care law, but the highest court in the country also will hand down judgment on Arizonas stringent illegal immigration law.

Congress will be forced into action (or inaction) on federal student loans and highway projects both of which will expire within the next week.

The House will vote on whether to hold Attorney General Eric Holder in contempt of Congress due to his refusal to turn over some documents related to the Fast and Furious gunrunning operation.

Any one of those issues in isolation would be a major political event with resultant consequences on the presidential race. Combined them all in the space of a week and we may well look back at this coming seven days as where/when Obamas second term bid was made/broken.

We are in a short period right now where the candidates and the terms of the presidential debate will be defined, with several critical issues coming to a head and voters perceptions of the economy, and who will best deal with it, clarifying, said Steve Rosenthal, a longtime Democratic strategist.

First among equals when it comes to its impact on the dialogue of the presidential race is the Supreme Courts ruling on the Affordable Care Act, which is set to be handed down either Monday or Thursday.

The administration and Democrats spent the better part of a year wrestling the bill through Congress amid unified Republican opposition and worries within their party that they were doing too much too fast. When he signed the legislation into law, Obama touted it as a historic moment insisting he had done something that seven presidents had tried and failed to do and telling ABCs Charlie Gibson in December 2009 that this will be the single most important piece of domestic legislation passed since Social Security.

Given that proclamation, if the Court rules against the law its hard not to see it as a repudiation of a major part of Obamas first term in office.

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