President Obama blasted GOP opponents of his healthcare law as hypocrites after Republicans expressed concerns about the rocky rollout of

In his weekly address, Obama suggested that the GOP's focus on the issue was in bad faith because Republicans have pushed for years to repeal, defund or dismantle ObamaCare.

Republicans "spent the last few years so obsessed with denying … people access to health insurance that they just shut down the government and threatened default over it," Obama said.

"It's well past the time for folks to stop rooting for [the law's] failure."

Obama's comments come after a tough week for the administration., the online enrollment portal for ObamaCare coverage, remained mired in problems in its fourth week.

The rollout has drawn fire from Republicans and Democrats alike, including former members of the administration.

This week, Obama announced several steps to improve the system's functionality, including appointing former White House budget director Jeff Zients as a chief "fixer" for the site.

Federal health officials are also benefiting from a "tech surge" involving experts brought in to triage the sign-up process.

Republicans argue that the disastrous rollout of indicates that ObamaCare is unworkable and have promised tough oversight on the implementation stumbles.

Obama pushed back on Saturday, citing the law's more popular provisions and explaining the logic behind the insurance marketplaces.

The website "gathers insurers under one system to compete for your business," Obama said. "And that choice and competition have actually helped bring prices down."

Obama also described efforts to repair the enrollment process, urged frustrated users to try enrolling by telephone and vowed not to give up until the process is smooth.

"We're only a few weeks into a six-month open enrollment period, and everyone who wants insurance through the marketplace will get it," Obama said.