No mention of the change to no limit on income
I assume since you are talking deductibility you are talking a traditional IRA, not a roth
If your spouse IS COVERED by a retirement plan at work (401K etc.) you are limited to a total Adjusted gross income of 150K for full deductibility 160K for partial deductibility
If your spouse is NOT covered by a retirement plan, then you can deduct the contribution regardless of his income.
When you opened the IRA is immaterial as they are kind of considered separate for each tax year.
HEre is the link to the IRS publication: