In general, obtaining permanent residence through marriage is one of the easier paths to winning a green card.
The same cannot be said about winning lawful residency status via a second (or third) marriage.
There are two remarriage situations which the government views with extra scrutiny.
In the first, the immigrant spouse was granted a green card via her first marriage. Now she seeks to immigrate a new husband.
In the second, the immigrant did not win a green card through the first marriage. After divorce and remarriage, a new spouse seeks to petition her once again.
Both scenarios present complications surpassing the difficulty level of succes in first marriages.
Recommended Links For More Information:
What You Need To Know About Remarriages And Green Cards
What Every Immigrant Needs To Know About Hostile Divorce Cases