One key factor in deciding when and where a family will move has increased in importance as the country witnesses a large sorting from the political Left and Right.

Republicans are leaving Democratic states in droves and flocking to states that are more conservative, and vice versa, a new report from the Associated Press has found. Conservative Californians are driven to Florida, Arizona, or Idaho, while liberal Texans are moving north to Denver, Colorado.

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One issue that has accelerated the division has been individual states' handling of the COVID-19 pandemic, according to Mike McCarter, who has pushed for the conservative area of Oregon to join Idaho.

“Then it was like ‘Oh, they can shut down any church and they can shut down my kids’ school?’” McCarter said. “If state-level government has that much power, you’d better be sure it reflects your values, not someone else’s values that are forced on you.”

When it comes to state legislatures, one party controls both legislative chambers in 48 states. In 28 of those states, the party in power has a supermajority in at least one chamber, which makes it difficult to overcome a veto. But overriding the veto is rarely necessary because only 10 states have governors with which the governor's party is different than the legislature's.

The contrast in cultural ideas between Colorado and Idaho are just two examples of polarization in the country. When it comes to abortion, Idaho makes it illegal to have an abortion once a heartbeat can be detected at about five or six weeks. Adults are also banned from helping a minor travel across state lines to receive an abortion in Idaho. But in Colorado, it is against state law to restrict abortion in any way.

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When it comes to state LGBT laws, minors cannot access gender transition surgery in Idaho, but youths can cross into Colorado legally to obtain the procedure in the Centennial State.

Although the transplants of new residents is a big part of the homogeneity in some states, it's not the sole cause. Other contributing factors include political parties polarizing on issues that have split on demographic lines, including topics such as guns and abortion.