Police in Las Vegas are investigating a weekend break-in at the office of Sen. Dean Heller, according to a Las Vegas Sun report.The burglary occurred at Heller’s local office in Las Vegas and a spokesman for Las Vegas Metropolitan Police confirmed Sunday night that “entry did occur” but would not comment further other than to say the investigation was ongoing.A spokesman for Heller did not immediately confirm the break-in.Heller (R-Nev.), whose seat is a top target for Democrats in 2018, is among the handful of Republican senators who have voiced concerns about the GOP’s proposed legislation to repeal and replace Obamacare.