romney, if elected president, states he will "repeal" obamacare, also known as the aca. The president cannot "repeal" legislation.
obama has done that with executive orders in the past so presidents do this sometimes.
1,461 days of the obama administration: Current list of president obama's executive orders
do you think obama broke the rules/laws when he did it? I thought that the president had that authority even though i dislike the way obama and bush have both used it in the past.
You are right though, presidents can't repeal legislation but they can put out executive orders to stop legislation's impact or to have legislation that did not pass go into effect (most recently obama's executive order on the dream act). However, under article 3, the supreme court can review any and all executive orders for constitutionality so there is a check on that power.
he certainly can issue elective orders that would stop the final phase of implementation but from a pure political standpoint, it would be unimaginable that the first act of the new president would be to cancel the insurance that 30 million people are counting on receiving within months.
Most of the items in the law will have been implemented such as the tax increases. Stopping the implementation of the insurance exchanges and all the insurance policy changes which would go into effect within months would be a disaster without accompanying legislation.
the only thing romney could do is submit replacement legislation to congress, which would only pass if republicans controlled both houses. Even with that control, it would certainly take at least a year or more to pass. By then 30 million more people will have insurance, low income tax payers will be getting tax credits for buying insurance. At that point, there isn't much that can be done. The only hope republicans have is scotus.