Making up for lost time, Republican delegates streamed into their storm-delayed national convention Tuesday to certify Mitt Romney's nomination for the White House and tear into his Democratic foe in a close presidential race in dreary economic times.

Mitt Romney accused President Barack Obama in person and in TV advertising Tuesday of cutting Medicare "to pay for Obamacare," launching a strong counterattack to Democratic charges that he and running mate Paul Ryan would radically remake the popular health care program that serves tens of millions of seniors.

President Barack Obama made his rival's personal millions a front-and-center issue in the race for the White House on Wednesday, telling a swing-state audience that Mitt Romney "is asking you to pay more so that people like him can get a big tax cut."

Pressing an election-year point, Republicans pushed yet another bill through the House on Wednesday to repeal the nation's two-year-old health care law, a maneuver that forced Democrats to choose between President Barack Obama's signature domestic achievement and a public that is persistently skeptical of its value.

House Republicans generally avoided talk of replacement measures on Tuesday as they mobilized for an election-season vote to repeal the health care law that stands as President Barack Obama's signature domestic accomplishment.

Turned away at the Supreme Court, congressional Republicans sketched a strategy Friday to repeal the nation's health care law in 2013 that requires a sweeping election victory carrying Mitt Romney to the presidency and the party at least to narrow control of the Senate.

The Supreme Court's 5-4 decision upholding the nation's health care law marks an enormous political victory for President Barack Obama in the heat of a re-election campaign, and affirmation as well for the Democrats' decades-long drive to extend coverage to millions of Americans who now go without.

Congressional Republicans intend to seek quick repeal of any parts of the health care law that survive a widely anticipated Supreme Court ruling, but don't plan to push replacement measures until after the fall elections or perhaps 2013.