The members of Congress most likely to sponsor or co-sponsor legislation mentioning immigration aren't necessarily the ones most likely to talk about it, according to data from Quorum.

Why it matters: Immigration has become a fiery political issue, but very little has been done about it in Congress over the years.

• The House will vote this week on a pair of bills Democrats and immigration advocates hope will eventually become law — either by winning over 10 Senate Republicans or by tying the bills to the next reconciliation package.

Quorum compiled its data from its analysis of bill language, social media posts, press releases and newsletters to constituents.

The big picture: No Republican lawmakers rank in the top five in either category, despite immigration being a huge talking point for their party.