After more than 100 days away from Capitol Hill, Rep. Tom Kean Jr., R-N.J., is set to return to Washington, D.C., in the coming weeks.Kean, 57, will be present for votes during the June 30 session, a spokesperson for the congressman confirmed to Fox News Digital. The two-term New Jersey lawmaker has been sidelined for months with a personal health issue and has yet to disclose the nature of the ailment. Kean has pledged to be transparent about his illness once he is back in Washington.The New Jersey Globe first reported the timing of Kean’s expected return. He previously told the outlet his medical issue did not affect his cognitive health and will not have any chronic complications that could impair his ability to seek a third House term.HOUSE REPUBLICAN MISSES ANOTHER WEEK OF VOTES AS HEALTH ABSENCE STRAINS THIN MAJORITYThe embattled lawmaker has not been seen in public or cast a vote on the House floor since early March, amounting to 135 missed roll call votes, according to GovTrack.Kean’s office has still continued to introduce legislation and post on social media. The New Jersey Republican is expected return to Washington ahead of November's midterm elections will be relatively short-lived. With just over 30 legislative days remaining, lawmakers are scheduled to spend nearly all of August and October back home campaigning for reelection. DEMS PICK CHALLENGER FOR GOP CONGRESSMAN WHO VANISHED FROM PUBLIC VIEW AMID HEALTH MYSTERYThursday’s announcement comes as Kean is facing a significant reelection challenge from former Navy helicopter pilot Rebecca Bennett in one of the country’s most competitive House battleground districts.Bennett, who is expected to lean into her national security background on the campaign trail, defeated several Democrat primary challengers in May to advance to the general election.She has largely refrained from criticizing Kean during his absence, but said he must be transparent with voters about his health issue.Kean, who has the endorsement of President Donald Trump, ran unopposed for the GOP nomination, but his future in Congress remains unclear amid his absence and health concerns. The nonpartisan Cook Political Report rates the New Jersey contest in the suburban swing seat as a "toss-up."