As Congress and President Donald Trump turn to 2018, it’s uncertain which big-ticket legislative item they will turn to next. President Trump has promised to unveil his long-awaited infrastructure plan after passing tax reform, but it’s not a sure thing that he will pivot to infrastructure next.

Trump’s infrastructure package, which was once a top priority for his first 100 days in office, fell down the list in 2017 to other legislative initiatives. Republicans may take another shot at trying to repeal and replace Obamacare next, they could try and tackle welfare reform, or they could pivot to several other administration priorities.

Regardless, at some point in 2018, President Trump and Congress will turn to infrastructure.