Tax deductions on HELOC taken out from a prior primary residence before 2017

[jk01]

A HELOC taken out on a prior primary residence before 2017 and used as down pay for the new primary residence, is the interest sill deductible under 2018 tax laws?

[Anonymous]

is the debt secured by one or both homes.  yes = deductible subject to maximum amount allowed for home acquisition indebtedness.  no = not deductible